Loudspeaker Operation Patents (Class 381/59)
  • Patent number: 11212615
    Abstract: System, method, and various embodiments for providing a speaker normalization system are described herein. An embodiment operates by identifying a plurality of speakers connected to an audio device, wherein the audio device includes an internal speaker for which first capability information is known. Second capability information of each of the plurality of speakers is retrieved. User input indicating a relative position of each speaker is received. An audio configuration is calculated based on the second capability information and the relative position of each of the plurality of speakers. The calculated audio configuration is provided to each of the plurality of speakers, wherein each of the plurality of speakers is configured to receive and audibly output audio from the audio device based on the audio configuration.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: December 28, 2021
    Assignee: ROKU, INC.
    Inventors: Robert Curtis, Kasper Andersen, Andrey Eltsov, Mark Janossy
  • Patent number: 11202146
    Abstract: An IP speaker system is disclosed that includes an IP speaker connected to one or more external analog speakers. The IP speaker comprises a CPU that provides an audio data stream for transmission to a first amplifier and a second amplifier. The first amplifier outputs a first analog audio signal at a first power level for driving an internal driver of the IP speaker, and the second amplifier outputs a second analog audio signal at a second power level for driving one or more external drivers of the one or more external analog speakers. The CPU supervises the one or more external analog speakers so as to detect any speaker failure, disconnection, short or other change in operational status. The IP speaker also comprises a power circuit that receives electrical power transmitted over a network cable as its input power and provides output power available for consumption by the IP speaker and the one or more external analog speakers.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: December 14, 2021
    Assignee: ALGO COMMUNICATION PRODUCTS LTD.
    Inventor: Paul Zoehner
  • Patent number: 11197112
    Abstract: Examples described herein involve validating motion of a microphone during calibration of a playback device. An example implementation involves a mobile device detecting, via one or more microphones, audio signals emitted from one or more playback devices as part of a calibration process. After the one or more playback devices emit the audio signals, the mobile device determines whether the detected audio signals indicate that sufficient horizontal translation of the mobile device occurred during the calibration process. When the detected audio signals indicate that insufficient horizontal translation occurred, the mobile device displays a prompt to move the mobile device more while the one or more playback devices emit one or more additional audio signals as part of the calibration process. When the detected audio signals indicate that sufficient horizontal translation occurred, the mobile device calibrates the one or more playback devices with a calibration based on the detected audio signals.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: December 7, 2021
    Assignee: Sonos, Inc.
    Inventors: Jonathan Downing, Timothy Sheen, Daniel Valente
  • Patent number: 11197095
    Abstract: A memory stores a linear model predicting a preference rating for in-ear headphones. A processor is programmed to generate a headphone response curve defining a frequency response of a headphone, apply the linear model to the headphone response curve to determine a preference rating, and provide the preference rating to predict overall sound quality of the in-ear headphone without listening tests.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: December 7, 2021
    Assignee: Harman International Industries, Incorporated
    Inventors: Todd S. Welti, Sean E. Olive, Omid Khonsaripour
  • Patent number: 11184705
    Abstract: Systems and methods for protecting a loudspeaker from excessive excursion include an audio source, an adaptive excursion protection filter, an audio clipper, an inverse excursion protection filter, an amplifier and a loudspeaker. The system performs operations including receiving an audio signal, applying an excursion protection filter, the excursion protection filter adapting in real-time to one or more speaker conditions, clipping the audio signal, applying an inverse excursion protection filter, and amplifying, using an amplification circuit, the audio signal for output to the speaker.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: November 23, 2021
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Richard Hodges, Harry Lau, Michael Townsend
  • Patent number: 11183981
    Abstract: A method of monitoring electrical loads is disclosed. In an embodiment the method includes generating a first voltage signal and a second voltage signal, the second voltage signal in quadrature to the first voltage signal, injecting one of the first voltage signal or the second voltage signal into a signal propagation path towards an electrical load, sensing a current signal flowing through the electrical load as a result of the one of the first voltage signal or the second voltage signal injected into the signal propagation path and processing the first voltage signal, the second voltage signal and the sensed current signal.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: November 23, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventors: Stefano Valle, Flavio Polloni
  • Patent number: 11169766
    Abstract: A device to process an audio signal representing output sound includes one or more processors configured to generate, responsive to sensor data indicative of pressure detected at a housing of the device, output data based on a predicted effect of the pressure on an acoustic output of the device. The one or more processors are also configured, responsive to the output data, to adjust operation of an audio playback component that generates the acoustic output.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: November 9, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Graham Bradley Davis, Ricardo De Jesus Bernal Castillo, Rivanaldo Sergio De Oliveira
  • Patent number: 11166118
    Abstract: A system, method, and computer-readable medium are disclosed for performing an audio output detection operation. The audio detection operation includes: identifying a reference audio output associated with a manufacturing environment; calibrating a threshold noise level of the manufacturing environment; monitoring the manufacturing environment for an audio output above a predefined noise threshold; comparing the audio output above the predefined noise threshold with the reference audio output; and, present information associated with the audio output above the predefined noise threshold upon detection of a match between the audio output above the predefined noise threshold and the reference audio output.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: November 2, 2021
    Assignee: Dell Products L.P.
    Inventors: Felipe Goulart Athayde, Eder Furtado Soares, Francisco Carlos de Mattos Brito Oliveira, Lidiane Castro Silva, Robson dos Santos Sampaio, Raizielle Ferreira Lima, Nelson Alex Silva Lima, João Isaac Silva Miranda
  • Patent number: 11159906
    Abstract: The present technology relates to an HRTF measurement method, an HRTF measurement device, and a program which can more simply acquire a head-related transfer function of an individual. The HRTF measurement device displays an image indicating a target direction that a user is to face. In a case where a front direction of the user and the target direction are matched, the HRTF measurement device outputs a measurement sound from a speaker and measures an HRTF on the basis of a result of receiving the measurement sound through a microphone mounted on an ear of the user. The present technology can be applied to, for example, a device which measures a head-related transfer function and the like.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: October 26, 2021
    Assignee: Sony Corporation
    Inventors: Tetsu Magariyachi, Yuhki Mitsufuji, Homare Kon
  • Patent number: 11153043
    Abstract: Embodiments described herein generally relate to measuring and evaluating a test signal generated by a device under test (DUT). In particular, the test signal generated by the DUT may be compared to a reference signal and scored based on the comparison. For example, a method may include: capturing a test signal from a device under test; splicing the test signal into a plurality of test audio files based on a plurality of frequency bins; at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files, the plurality of reference audio files being associated with a reference signal; and calculating a performance score of the device under test based on the comparisons.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: October 19, 2021
    Assignee: Roku, Inc.
    Inventor: Nermin Osmanovic
  • Patent number: 11140478
    Abstract: A system for driving an audio speaker that has an impedance, the system comprising: a scaler having an analog input and a scaler output that is an attenuated analog input; an amplifier having an amplifier input coupled to the scaler output and an amplifier output; a current sensor having a sensor input coupled to the speaker and a sensor output, the current sensor configured to generate a sensor signal at the sensor output responsive to a current from the audio speaker; and a compensator circuit having a circuit input coupled to the sensor output and a circuit output coupled to the amplifier input, the compensator circuit configured to supply a compensation signal to the amplifier input by applying a transfer function to the sensor signal.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: October 5, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rahmi Hezar, Rajan Narasimha, Srinath Ramaswamy
  • Patent number: 11121620
    Abstract: An integrated cinema amplifier comprises a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: September 14, 2021
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Andrew Healy, Edward J. Neary, Erich H. Vogel, Andrew M. Poulain, Gregory J. Long, Joel A. Butler, Angela S. Williams, Luca Revelli, Dossym Nurmukhanov, Tanner Cook, Marcelo Traverso M., Kenneth Schindler
  • Patent number: 11038635
    Abstract: Embodiments described herein generally relate to measuring and evaluating a test signal generated by a device under test (DUT). In particular, the test signal generated by the DUT may be compared to a reference signal and scored based on the comparison. For example, a method may include: capturing a test signal from a device under test; splicing the test signal into a plurality of test audio files based on a plurality of frequency bins; at each frequency bin, comparing each of the plurality of test audio files to a corresponding reference audio file from among a plurality of reference audio files, the plurality of reference audio files being associated with a reference signal; and calculating a performance score of the device under test based on the comparisons.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: June 15, 2021
    Assignee: Roku, Inc.
    Inventor: Nermin Osmanovic
  • Patent number: 11032657
    Abstract: A method and system for calibrating an integrated volume acceleration sensor of a loudspeaker, wherein the method includes driving the loudspeaker with a calibration signal and meanwhile generating a sensor output signal by the integrated volume acceleration sensor measuring a volume acceleration over time of a motion element fixed to a moving part of the loudspeaker and/or of the moving part while the loudspeaker is driven with the calibration signal as well as generating a reference output signal by a reference sensor measuring the volume acceleration over time of the motion element and/or of the moving part of the loudspeaker while the loudspeaker is driven with the calibration signal, and additionally includes calculating a calibration value for the integrated volume acceleration sensor based on a ratio of the sensor output signal and the reference output signal and based on a predetermined reference calibration value of the reference sensor.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: June 8, 2021
    Assignee: SIEMENS INDUSTRY SOFTWARE NV
    Inventor: Tom Knechten
  • Patent number: 11026033
    Abstract: Examples associated with audio component adjusting are described. One example includes storing a degradation for an audio component embedded in a device. A characteristic of the audio component is compared to the degradation model for the audio component. When the characteristic of the audio component indicates the audio component has reached a certain point on the degradation model, an attribute of the audio component is adjusted.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: June 1, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Raghotham Reddy Nathadi, Wayne Park, Kevin Richard Pare
  • Patent number: 11026035
    Abstract: An audio output system for energizing a multiple voice coil transducer supplies at least two power output signals to the voice coils, a pilot tone generator for generating a pilot tone signal, and a power output circuit. The power output circuit generates power output signals from the pilot tone and the input signal so that the voice coils respond to the input signal with an in-phase electro-mechanical relationship and respond to the pilot tone with an out-of-phase (motion canceling) electro-mechanical relationship, reducing the effect of the pilot town on mechanical movement of the voice coil. A sensing circuit senses electrical signal values at terminals of the at least two voice coils, and a processing circuit detects a response of the output transducer to the pilot tone and determines at least one operating characteristic of the output transducer from the electrical signal values.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: June 1, 2021
    Assignee: CIRRUS LOGIC, INC.
    Inventor: Anthony S. Doy
  • Patent number: 11019432
    Abstract: A speaker includes a frame, a magnet, a diaphragm, a first coil, and a second coil assembly. The second coil assembly includes at least one second coil group, and each second coil group includes two second coils. The magnet and the diaphragm are mounted on the frame. The first coil and each second coil are coupled to the diaphragm. The first coil is configured to drive the diaphragm to vibrate. The second coil assembly is configured to, when the diaphragm vibrates and a difference between vibration displacements of two vibration regions in the diaphragm that are correspondingly coupled to two second coils in any second coil group exceeds a preset threshold, drive at least one of the two vibration regions to move to reduce the difference between the vibration displacements of the two vibration regions.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 25, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jun Ding, Dahe Kou, Bin Du
  • Patent number: 11012800
    Abstract: A correction system and a correction method of signal measurement are provided. In the method, a transmitted signal and a received signal are divided into a plurality of transmitted signal groups and a plurality of received signal groups according to a time length, respectively. The received signal is related to a signal received after the transmitted signal is transmitted, and the transmitted signal is a periodic signal. A plurality of to-be-evaluated groups are selected from the received signal groups according to a correlation between the transmitted signal groups and the received signal groups. The correlation corresponds to a delay between the transmitted signal and the received signal. The signal energy of the received signal is determined according to the signal energy of the to-be-evaluated groups. Accordingly, the accuracy of signal measurement can be improved.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: May 18, 2021
    Assignee: Acer Incorporated
    Inventors: Po-Jen Tu, Jia-Ren Chang, Kai-Meng Tzeng
  • Patent number: 10999685
    Abstract: A method (200) of operating a hearing aid system with a very low delay. The invention also provides a hearing aid system (100, 300, 400) adapted for carrying out such a method.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 4, 2021
    Assignee: Widex A/S
    Inventors: Thomas Bo Elmedyb, Lars Dalskoy Mosgaard, Jakob Nielsen, Georg Stiefenhofer, Adam Westermann, Michael Pihl
  • Patent number: 10972858
    Abstract: A method for processing an audio signal in accordance with a room impulse response is described. The audio signal is separately processed with an early part and a late reverberation of the room impulse response, and the processed early part of the audio signal and the reverberated signal are combined. A transition from the early part to the late reverberation in the room impulse response is reached when a correlation measure reaches a threshold, the threshold being set dependent on the correlation measure for a selected one of the early reflections in the early part of the room impulse response.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: April 6, 2021
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Simone Neukam, Jan Plogsties
  • Patent number: 10966022
    Abstract: An augmented reality environment allows interaction between virtual and real objects. Multiple microphone arrays of different physical sizes are used to acquire signals for spatial tracking of one or more sound sources within the environment. A first array with a larger size may be used to track an object beyond a threshold distance, while a second array having a size smaller than the first may be used to track the object up to the threshold distance. By selecting different sized arrays, accuracy of the spatial location is improved.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: March 30, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Wai C. Chu, Edward Dietz Crump
  • Patent number: 10955287
    Abstract: A system and method for detecting the occurrence of a gunshot are provided. The method may include receiving acoustic signals at a microphone indicative of a magnitude of the acoustic signal at a plurality of discrete frequencies, converting the acoustic signals to a digital signal and then employing a Goertzel algorithm based digital signal filter on the digital signal to produce Goertzel magnitudes at the plurality of discrete frequencies. The method subsequently determines if a maximum value of the digital signal is higher than a predefined threshold value. If the threshold value is exceeded, the method predicts if the Goertzel magnitudes at the plurality of discrete frequencies are indicative of a gunshot sound via gradient boosting; and, transmits a signal indicative of a gunshot occurrence after predicting if a possible gunshot event has occurred. A debouncer may also be utilized to suppress duplicative signals.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: March 23, 2021
    Assignee: Trinity Gunshot Alarm System, LLC
    Inventors: Stacy Jax, Martin Mauersberg
  • Patent number: 10957332
    Abstract: An acoustic characteristic measurement device includes a speaker configured to output an acoustic signal in which a watermark signal is embedded; a microphone configured to perform sound collection with respect to the acoustic signal output from the speaker in a predetermined listening position; and an acoustic characteristic measurement unit configured to determine an acoustic characteristic of an acoustic space from the speaker to the listening position, on the basis of the watermark signal embedded in the acoustic signal which is subjected to the sound collection by the microphone.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: March 23, 2021
    Assignee: ALPINE ELECTRONICS, INC.
    Inventors: Taku Sugai, Nozomu Saito, Jyoji Yamada
  • Patent number: 10951189
    Abstract: The present invention discloses a signal processing device, a signal processing method and a speaker. The signal processing device comprises a multi-band dynamic range controller, wherein the multi-band dynamic range controller receives an audio signal and includes a first band splitting unit and a resonant band adjustment unit; the first band splitting unit is configured to split the audio signal into multiple bands and obtain at least one resonant band therefrom, which has a resonant frequency band signal in a resonant frequency range of the audio signal; and the resonant band adjustment unit is configured to adjust the resonant frequency band signal based at least on a resonant band dynamic range control gain and output an adjusted resonant frequency band signal for combination with other band signals into a compression output signal.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 16, 2021
    Assignee: GOERTEK INC.
    Inventors: Jakob Birkedal Nielsen, Andrew Paddock Bright
  • Patent number: 10939877
    Abstract: A robust alarm system has an alarm controller adapted to input an alarm trigger and to generate at least one alarm drive signal in response. Alarm subsystems input the alarm drive signal and activate one or more of multiple alarms accordingly. A subsystem function signal provides feedback to the alarm controller as to alarm subsystem integrity. A malfunction indicator is output from the alarm controller in response to a failure within the alarm subsystems.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: March 9, 2021
    Assignee: Masimo Corporation
    Inventors: Massi Joe E. Kiani, Mohamed Kheir Diab, Marcelo M. Lamego
  • Patent number: 10936277
    Abstract: A method (100) for calibrating a sound delivery system (1) having a processing assembly, a data communications assembly (9) coupled to the processing assembly, and at least one audio transducer (21a, 21b) mounted with at least one processor (11) of the processing assembly and responsive thereto for delivering sound to a user (3), the method including the steps of: transmitting from a remote user interface device (6) for the sound delivery system, a sequence of command codes for specifying predetermined characteristics of test sounds; receiving the command code sequence at the communications assembly of the sound delivery system; providing the command code sequence to the processing assembly of the sound delivery system; reproducing by a selected at least one audio transducer, the predetermined test sounds under control of said at least one processor according to the command code sequence; measuring with a reference SPL meter (70) proximate to the audio transducer, characteristics of test sounds reproduced by
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: March 2, 2021
    Assignee: Audeara Pty Ltd.
    Inventors: Christopher Arnold Jeffery, James Alexander Fielding, Alex John Afflick
  • Patent number: 10938833
    Abstract: A method of multi-factor authentication includes receiving, by a remote hosting server from a terminal, a request from a user possessing a trusted device to access a remote service. The remote hosting server generates challenge chirp signal information and sends the challenge chirp signal information to the terminal and the device. Measurements are received of a room impulse response taken by each of the terminal and the trusted device using the chirp signal information. It is checked whether a location of the terminal is known based on a measurement of the room impulse response. The measurements of the room impulse response of the terminal and the trusted device are compared. A level of access to the remote service is granted to the user based on whether the location of the terminal is known and whether the trusted device is present at the location of the terminal.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: March 2, 2021
    Assignee: NEC CORPORATION
    Inventor: Hien Truong
  • Patent number: 10918811
    Abstract: The disclosure relates to an audible indicator in combination with a drug delivery device having a resilient force member capable of resting in either of two states. In a biased state, the resilient force member is biased and stores energy and in a relaxed state, the resilient force member is relaxed. The resilient force member releases the stored energy when changing from the biased state into the relaxed state, thereby generating an audible signal, wherein the resilient force member is supported by a retaining element in the biased state in order to prevent transition into the relaxed state.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: February 16, 2021
    Assignee: Sanofi-Aventis Deutschland GMBH
    Inventors: Carsten Mosebach, Thomas Mark Kemp, Louise Hodgson, William Timmis
  • Patent number: 10917723
    Abstract: An audio signal processing device and an audio signal adjusting method thereof. The audio signal processing device includes a gain determining circuit and an audio signal processing circuit. The gain determining circuit receives an analog audio signal. The gain determining circuit determines a gain based on a difference between a predefined threshold and an amplitude of the analog audio signal in response to detecting that a current sampling amplitude of the analog audio signal is greater than the predefined threshold. The audio signal processing circuit is coupled to the gain determining circuit and receives the analog audio signal and the gain. The audio signal processing circuit attenuates the analog audio signal according to the gain to generate an output audio signal.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: February 9, 2021
    Assignee: ALi (China) Corporation
    Inventors: Yue-Yong Chen, Ben-Xiang Qu
  • Patent number: 10904663
    Abstract: One embodiment provides a method for nonlinear control of a loudspeaker. The method comprises determining a target displacement of a diaphragm of a speaker driver of the loudspeaker based on a physical model of the loudspeaker and a source signal for reproduction via the speaker driver. The method further comprises determining, based on the target displacement, a corrected drive signal that compensates for action of reluctance force on the speaker driver during the reproduction of the source signal, and transmitting the corrected drive signal to a power amplifier connected to the loudspeaker. The power amplifier drives the speaker driver based on the corrected drive signal. Audio distortion generated by the speaker driver during the reproduction of the source signal is reduced based on the power amplifier output, via the corrected drive signal.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: January 26, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: James Lazar
  • Patent number: 10880651
    Abstract: A signal processing device includes a switching receptor, a storage, and a signal processor. The switching receptor receives switching of a speaker serving as a supply destination of a signal. The storage stores an optimal setting, which is obtained by measuring characteristics of the speaker selected by the switching, in association with the switching of the speaker. The signal processor reads out the optimal setting, which is associated with the switching received by the switching receptor, from the storage, and uses the optimal setting to process the signal to be supplied to the speaker.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: December 29, 2020
    Assignee: YAMAHA CORPORATION
    Inventor: Hironari Kawai
  • Patent number: 10856059
    Abstract: Wireless-enabled loudspeaker includes a wooden capacitive touch user interface. The loudspeaker may comprise at least one electroacoustic transducer, a processor in communication with the at least one electroacoustic transducer, and a wooden exterior surface comprising a capacitive touch user interface that allows a user to control operation of the loudspeaker. The wooden exterior surface acts a dielectric for the capacitive touch user interface. The loudspeaker may comprise a wireless transceiver circuit for receiving and transmitting wireless communication signals via a wireless network. The wireless transceiver circuit may receive wirelessly audio content from streaming audio content servers that are connected to the Internet. The capacitive touch user interface comprises a plurality of user control icons etched in the wooden exterior surface, and a plurality of capacitive sense electrodes located under the wooden exterior surface.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: December 1, 2020
    Assignee: KOSS CORPORATION
    Inventors: Michael J. Koss, Michael J. Pelland, Nicholas Blair
  • Patent number: 10834504
    Abstract: A temperature detecting and controlling integration device for the micro speaker is provided. After the filter receives an input signal, the power amplifier adjusts the power amplification, and the multi-frequency detection signal is generated with the waveform generator. The extracted signal is generated to drive the micro speaker to emit a sound signal. Afterwards, the voltage signals are extracted at two ends of the coil and the temperature signal is obtained by converting, capturing, and integrating to pass the temperature value to the external device, and the temperature value of the non-linear temperature-controlling unit is analyzed to adjust the compensation gain in real time. The smoothly control of speaker temperature and stable playback of the sound signals is played that can be achieved.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: November 10, 2020
    Assignee: XIAMEN FOURIER ELECTRONICS CO., LTD.
    Inventors: Xuexin Ding, Weiji Liu, Jian Xu, Lin Zhang, Xiaolei Liu, Yingshun Jiang, Fangkang Shen
  • Patent number: 10826441
    Abstract: Example embodiments provide a process that includes one or more of receiving an audio signal at a feedback compressor circuit, determining how much to attenuate the audio signal when a power level of the audio signal exceeds a threshold power level, combining the audio signal with an auxiliary attenuation signal from an auxiliary attenuation source and a compressed attenuation signal from the feedback compressor circuit to create a combination signal, and generating an audio output signal of the feedback compressor circuit based on the combination signal.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: November 3, 2020
    Assignee: Biamp Systems, LLC
    Inventor: Aaron Faulstich
  • Patent number: 10827270
    Abstract: A signal processing device includes a switching receptor, a storage, and a signal processor. The switching receptor receives switching of a speaker serving as a supply destination of a signal. The storage stores an optimal setting, which is obtained by measuring characteristics of the speaker selected by the switching, in association with the switching of the speaker. The signal processor reads out the optimal setting, which is associated with the switching received by the switching receptor, from the storage, and uses the optimal setting to process the signal to be supplied to the speaker.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: November 3, 2020
    Assignee: YAMAHA CORPORATION
    Inventor: Hironari Kawai
  • Patent number: 10817253
    Abstract: An embodiment of an audio controller device includes technology to control an output of a first audio signal from an audio output device in a human interface frequency range, where the human interface frequency range includes frequencies audible to humans, and control an output of a second audio signal from the audio output device in a device interface frequency range independent from the output of the first audio signal, where the device interface frequency range includes frequencies above an upper limit of the human interface frequency range. Other embodiments are disclosed and claimed.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: October 27, 2020
    Assignee: Intel Corporation
    Inventors: Xintian Lin, Matias Almada
  • Patent number: 10802472
    Abstract: The present disclosure relates to the technical field of electronic devices, and discloses a method and an apparatus for controlling motor vibration. The method includes: obtaining an input signal based on an expected motor vibration curve, inputting a digital signal sequence of the input signal to an equalizer, and obtaining an output signal after processing by the equalizer, and inputting the output signal to a motor to control vibration of the motor, where the equalizer is a digital filter constructed based on a damping factor ? and a resonance frequency ?n of the motor, and a preset system sampling frequency fs, a preset damping factor ?d, and a preset cut-off frequency ?d. The method and apparatus provided in embodiments of the present disclosure have an advantage that an actual vibration effect of the motor can be consistent with an expected motor vibration curve.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: October 13, 2020
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Hanlin Deng, Liang Jiang, Zheng Xiang, Tao Li, Wensheng Xu
  • Patent number: 10757520
    Abstract: A measuring apparatus for measuring the force factor of a dynamic loudspeaker driver comprises first and second terminals for connecting a dynamic loudspeaker driver to the measuring apparatus, an amplifier configured to generate a voltage, a voltage measuring device configured to measure the voltage present at the first terminal, a displacement measuring device configured to measure the displacement of the membrane of the dynamic loudspeaker driver with respect to the magnet, and an electric/electronic device connected between the amplifier and the first terminal. The measuring apparatus is configured to operate in a first mode of operation the amplifier to generate a voltage and to operate the electric/electronic device to have a low impedance during the first mode of operation, such that the voltage is substantially present at the first terminal in order to displace the membrane with respect to the magnet.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: August 25, 2020
    Assignee: Sound Solutions International Company, Ltd.
    Inventor: Friedrich Reining
  • Patent number: 10750283
    Abstract: Attenuation of output levels is suppressed while interference due to a plurality of vibrators is reduced. An acoustic control device 30 performs correction processing of correcting phase delay characteristics including transmission systems from exciters 21L and 21R which are first and second vibrators connected with a rigid body, on acoustic signals SR and SL. Thereafter, the acoustic control device 30 controls the exciters 21L and 21R on the basis of the corrected acoustic signals SL1 and SR1.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: August 18, 2020
    Assignee: CLARION CO., LTD.
    Inventors: Kazutomo Fukue, Takeshi Hashimoto, Kenji Kono, Yasuhiro Fujita
  • Patent number: 10701485
    Abstract: One embodiment provides a method comprising determining a potential energy in a loudspeaker, a kinetic energy in the loudspeaker, and an electrical energy in the loudspeaker based on a physical model of the loudspeaker. The method further comprises determining a total energy stored in the loudspeaker based on the potential energy, the kinetic energy, and the electrical energy. The method further comprises determining a maximum potential displacement of a diaphragm of a speaker driver of the loudspeaker based on the total energy, and limiting the total energy stored in the loudspeaker by attenuating a source signal for reproduction via the loudspeaker. An actual displacement of the diaphragm during the reproduction of the source signal is controlled based on the attenuated source signal.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: June 30, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pascal M. Brunet, Glenn S. Kubota
  • Patent number: 10698007
    Abstract: A method and apparatus of load detection for an audio amplifier system is described. A load detector includes a first load terminal and a second load terminal; a controller coupled to the first and second load terminals and configured to in a first control loop, vary a first current supplied to a first load terminal dependent on the difference between a first reference signal and the detected first load terminal voltage; and in a second control loop, vary a second current supplied to the second load terminal dependent on the difference between a second reference signal and the detected second load terminal voltage; and to determine a current through a load connected between the first load terminal and the second load terminal from the second current value, and a voltage across the load from the detected voltage difference between the first load terminal voltage and the second load terminal voltage.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: June 30, 2020
    Assignee: NXP B.V.
    Inventors: Fred Mostert, Gertjan van Holland, Paul Wielage
  • Patent number: 10701501
    Abstract: Examples described herein involve calibrating one or more playback devices. An example implementation involves a mobile device receiving data representing an audio signal recorded via a microphone at multiple locations between a first physical location and a second physical location within a given environment while one or more playback devices played back calibration audio within the given environment. Based on the received data representing the audio signal, the mobile device determines acoustic characteristics of the given environment. Based on the determined acoustic characteristics of the given environment, the mobile device determines one or more audio processing algorithms to adjust audio output of the one or more playback devices in the given environment to have a pre-determined audio characteristic and causes, via a network interface, the one or more playback devices to apply the determined one or more audio processing algorithms to playback of audio content.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: June 30, 2020
    Assignee: Sonos, Inc.
    Inventor: Timothy W. Sheen
  • Patent number: 10674294
    Abstract: A terminal device and a method for removing dust in a sound outlet hole of a loudspeaker are provided. The method includes the following: measuring a natural frequency of the loudspeaker, generating an audio file for removing dust according to the natural frequency, and prestoring the audio file for removing dust, wherein a vibration amplitude of a vibration diaphragm of the loudspeaker is at a maximum when the vibration diaphragm is driven to vibrates by an exciting current having the natural frequency; reading the prestored audio file for removing dust; and controlling the loudspeaker to play the audio file for removing dust, to generate air flow in the sound outlet hole, wherein when the loudspeaker plays the audio file for removing dust, a wind speed of the air flow through the sound outlet hole is at a maximum.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: June 2, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Ling Ouyang
  • Patent number: 10616683
    Abstract: This application relates to methods and apparatus for loudspeaker protection. A loudspeaker protection system receives a digital audio signal comprising a plurality of samples at an input node. A delay block delays the digital audio signal and a gain block applies a controlled gain to the delayed digital audio signal. An excursion predictor is configured to receive a version of the audio signal from the signal path upstream of the delay block and determine a predicted excursion for a loudspeaker based on the audio signal. A gain controller controls a gain setting of the gain block in response to the predicted excursion and a first loudspeaker impulse response model and a predetermined excursion limit. The gain controller is configured to determine at least one gain setting {ga gi} to be applied to a set of samples {Va . . .
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: April 7, 2020
    Assignee: Cirrus Logic, Inc.
    Inventors: Jason William Lawrence, Roger David Serwy, Roberto Napoli
  • Patent number: 10609482
    Abstract: A memory previously stores, as reference impedance characteristics, frequency characteristics of impedance of the speaker during a normal operating state of the speaker. During use of the speaker, a detection circuitry detects, as current impedance characteristics, frequency characteristics of impedance of the speaker on the basis of a real-time audio signal being supplied to the speaker. A determination circuitry determines presence/absence of an abnormality of the speaker on the basis of comparison between the detected current impedance characteristics and the stored reference impedance characteristics. Thus, it is possible to check the operation of the speaker based on of the real-time audio signal without using any dedicated test signal. In this way, it is possible to detect presence/absence of an abnormality of the speaker on the basis of a real-time audio signal being supplied to the speaker, for example, during an actual performance in a concert.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: March 31, 2020
    Assignee: Yamaha Corporation
    Inventor: Mitsutaka Goto
  • Patent number: 10547950
    Abstract: A mobile terminal includes: a controller, and a piezoelectric excitation portion including a first excitation source, and a second excitation source surrounding the first excitation source, wherein: the controller is configured to control the first excitation source to generate a first vibration driving force and control the second excitation source to generate a second vibration driving force when the mobile terminal is in a handset mode, such that at a position where the second excitation source is located, a first vibration wave generated by the first vibration driving force and a second vibration wave generated by the second vibration driving force have opposite vibration directions, and a vibration amplitude of the second vibration wave is less than or equal to that of the first vibration wave.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: January 28, 2020
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Diyun Xiang
  • Patent number: 10542361
    Abstract: One embodiment provides a system for nonlinear control of a loudspeaker. The system comprises a current source amplifier connected to the loudspeaker, and a controller connected to the current source amplifier. The controller is configured to determine a target displacement of a diaphragm of the speaker driver based on a source signal for reproduction via the loudspeaker, determine a control current based on the target displacement of the diaphragm and a first physical model of the loudspeaker, and transmit a control current signal specifying the control current to the current source amplifier. The current source amplifier outputs the control current to drive the speaker driver based on the control current signal. An actual displacement of the diaphragm during the reproduction of the source signal is controlled based on the control current, via the control current signal.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: January 21, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: James F. Lazar, Pascal M. Brunet
  • Patent number: 10523172
    Abstract: The various implementations described herein include methods, devices, and systems for automatic audio equalization. In one aspect, a method is performed at an electronic device that includes speakers, microphones, processors and memory. The electronic device outputs audio user content from the speakers and automatically equalizes subsequent audio output of the device without user input. The automatic equalization includes: (1) obtaining audio content signals, including receiving outputted audio content at each microphone; (2) determining from the audio content signals phase differences between microphones; (3) obtaining a feature vector based on the phase differences; (4) obtaining a frequency correction from a correction database based on the obtained feature vector; and (5) applying the obtained frequency correction to the subsequent audio output.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: December 31, 2019
    Assignee: GOOGLE LLC
    Inventors: Benjamin Louis Shaya, Rasmus Larsen, Richard F Lyon, Michael Smedegaard
  • Patent number: 10499154
    Abstract: A wireless speaker audio system configured to receive audio information wirelessly transmitted by an audio source including first and second wireless transceivers. The first wireless transceiver establishes a bidirectional secondary wireless link with the audio source for receiving and acknowledging receipt of the audio information. The first and second wireless transceivers communicate with each other via a primary wireless link. A wireless audio system including an audio source and first and second wireless transceivers. The first and second wireless transceivers communicate via a primary wireless link. The audio source communicates audio information to the first wireless transceiver via a secondary wireless link which is configured according to a standard wireless protocol. The first wireless transceiver is configured to acknowledge successful reception of audio information via the secondary wireless link. Other embodiments are also described and claimed.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: December 3, 2019
    Assignee: Apple Inc.
    Inventors: Clarke S. Watson, Benjamin W. Cook, Axel D. Berny, Jason A. Trachewsky
  • Patent number: 10489994
    Abstract: A computer is programmed to receive audio data from a first vehicle sensor following an instruction to a second vehicle to actuate sound output. The computer generates diagnostic data about the received audio data. The computer may then actuate output based on the diagnostic data.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: November 26, 2019
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Aed M. Dudar