Loudspeaker Operation Patents (Class 381/59)
  • 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: 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: 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: 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: 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: 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: 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
  • Patent number: 10483930
    Abstract: User adjustment of an audio effect of an audio device is facilitated to match a hearing sensitivity of a user. The user can tune the audio device with a minimum perceptible level unique to the user. The audio device can adjust the audio effect in accordance with the minimum perceptible level. For example, a loudness level can adjust automatically to ensure that the user maintains a perceptible loudness, adjusting according to environmental noise and according to the minimum perceptible level. Also described herein are apparatuses, systems and methods related to an audio device equipped with embedded audio sensors that can maximize a voice quality while minimizing the effects of noise.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: November 19, 2019
    Assignee: BITWAVE PTE LTD.
    Inventors: Hui Siew Kok, Tan Eng Sui
  • Patent number: 10484792
    Abstract: A headphone that may reduce acoustic noise from a tactile vibration driver includes a housing, and an acoustic driver and tactile vibration driver within the housing. The tactile vibration driver is configured to generate tactile vibration sufficient to be felt by a user responsive to the input signal. The headphone also includes a noise cancellation unit coupled with the acoustic driver, the noise cancellation unit configured to: generate an adjustment signal based, at least in part, on a transfer function associated with the tactile vibration driver generating acoustic noise incidental to the tactile vibrations; and adjust the input signal responsive to the adjustment signal to transmit an output signal for reproduction by the acoustic driver. Related methods for operating and making such headphones are also disclosed.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: November 19, 2019
    Assignee: Skullcandy, Inc.
    Inventor: Branden Sheffield
  • Patent number: 10469046
    Abstract: One embodiment provides a device comprising a speaker driver, a microphone configured to obtain a measurement of a near-field sound pressure of the speaker driver, and a controller. The controller is configured to determine a velocity of a diaphragm of the speaker driver, and automatically calibrate sound power levels of audio reproduced by the speaker driver based on the velocity and the measurement of the near-field sound pressure to automatically adjust the sound power levels to an acoustic environment of the device.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: November 5, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Adrian Celestinos Arroyo
  • Patent number: 10462592
    Abstract: Examples described herein involve identifying one or more error conditions during calibration of one or more playback devices in a playback environment. A microphone of a network device may detect and sample an audio signal while the one or more playback devices in the playback environment plays a calibration tone. A processor of the network device may then receive, from the microphone, a stream of audio data. The audio data may include an audio signal component and a background noise component. As a subset of the audio data is received, the processor may identify based on the audio data, the one or more error conditions. The processor may then cause a graphical display to display a graphical representation associated with the identified error condition.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: October 29, 2019
    Assignee: Sonos, Inc.
    Inventors: Hilmar Lehnert, Timothy Sheen, Dayn Wilberding
  • Patent number: 10427600
    Abstract: A motor vehicle sound generator system has a housing in which a loudspeaker is accommodated. The housing has at least a first orifice and a second orifice. The orifices each have a sound transmission member provided thereon. The first orifice is arranged in a front side region of the loudspeaker and the second orifice is arranged in a rear side region of the loudspeaker as viewed in an axial direction of the loudspeaker. The sound generator system has a first sound outlet opening that is associated with the first orifice and a second sound outlet opening that is associated with the second orifice. The sound exits into open air through the first and second sound outlet openings, with the first and second sound outlet openings being free of exhaust gas flow.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: October 1, 2019
    Assignee: Faurecia Emissions Control Technologies
    Inventor: Tobias Schindele
  • Patent number: 10416068
    Abstract: A quantitative optical microscopy arrangement is described. Specifically, a digital filter derived from linear discriminant analysis is described for recovering impulse responses in applications that may include photon counting from a high speed photodetector and applied to remove ringing distortions from impedance mismatch in multiphoton fluorescence microscopy. Training of the digital filter is achieved by defining temporally coincident and non-coincident transients and identifying the projection within filter-space that best separates the two classes. The training allows rapid data analysis by digital filtering. The LDA filter is also capable of recovering deconvolved impulses for single photon counting from highly distorted ringing waveforms from an impedance mismatched photomultiplier tube.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 17, 2019
    Assignee: PURDUE RESEARCH FOUNDATION
    Inventors: Garth Jason Simpson, Ryan Douglas Muir, Shane Zachary Sullivan
  • Patent number: 10397727
    Abstract: A method clusters audio sources in virtual environments. The method is performed at a virtual-reality device displaying a virtual environment. The device identifies two audio sources in the virtual environment. For each of the two audio sources, the device determines a bounding box in the virtual environment. Each bounding box includes termination points for a respective plurality of rays emanating from a point in the virtual environment corresponding to the audio source. The device applies an overlap test to the bounding boxes to determine whether the two audio sources are in a same room. The device forms an angle according to rays from the location of the listener to the audio source points. When the two audio sources are in the same room and the angle is less than a predetermined threshold angle, the device clusters the two audio sources together, including rendering combined audio for the two audio sources.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: August 27, 2019
    Assignee: Facebook Technologies, LLC
    Inventor: Carl Schissler
  • Patent number: 10390155
    Abstract: Various systems and methods are disclosed herein to increase the quality of the sound delivered to a user and allow personalization to optimize listening performance and comfort under atypical listening conditions, environment specific adjustment, and data capture to assist in the personalization of the system to the user's needs and preferences. Features disclosed include sound level rating systems that aggregate noise data detected by user's mobile phones or hearing devices to provide a database of real-time noise levels. Additionally, a user's sound settings may be saved in the system by location so that they may be recalled when re-entering a specific location. A remote clinician may tune a hearing device, or a user can tune the device using a pre-recorded audio sample. Also, a user may replay the last X seconds of audio recorded by their hearing device.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: August 20, 2019
    Assignee: K/S HIMPP
    Inventors: Ted Simonides, Steve Manser, Dan Keller, Larry Wuensch, Drew Dundas, Mike Kisch
  • Patent number: 10387108
    Abstract: Method and apparatus for automatic gain control utilizing sound source position information in a shared space having a plurality of microphones and a plurality of sound sources. Sound signals are received from the microphones. One or more processors locate position information corresponding to each of the sound sources. The processor(s) determine the distance to each of the sound sources from each of the microphones. The processor(s) define a predetermined gain weight adjustment for each of the microphones. The processor(s) apply the defined weight adjustments to the microphones to achieve a consistent volume of the desired plurality of sound sources. The processor(s) maintain a consistent ambient sound level regardless of the position of the sound sources and the applied gain weight adjustments. The processor(s) output a summed signal of the sound sources at a consistent volume with a constant ambient sound level across the plurality of sound source positions.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: August 20, 2019
    Assignee: Nureva, Inc.
    Inventor: Grant Howard McGibney
  • Patent number: 10382856
    Abstract: A device having an earphone is provided to be attached to the tragus of the outer ear of a person, wherein two levers held to one another in a pivotal manner from opposite sides, driven by an elastically preloaded part, press onto the tragus. The levers both have two arms, wherein the pivot axis is at a distance from the ends of the two levers in the longitudinal direction of the lever and lies outside the normal projection towards the surface of the tragus when the device is attached as intended to the tragus, and/or the elastically preloaded part is a pre-curved bending spring which is pre-curved by more than 360°.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: August 13, 2019
    Inventor: Jerzy Franciszek Kucharko
  • Patent number: 10356541
    Abstract: A loudspeaker diaphragm state estimation method includes: adjusting a weight value of a diaphragm displacement model by adaptive filtering until an error between an estimated value of a driving voltage of a loudspeaker and a measured value of the driving voltage is less than a predetermined threshold; estimating a diaphragm relative displacement of the loudspeaker according to the diaphragm displacement model corresponding to a final determined weight value; determining a diaphragm relative speed at a next moment based on an input current, a product value of a vector determined by an estimated value of a diaphragm relative speed and an estimated value of a diaphragm relative displacement, and a weight value vector obtained at a present moment; and determining an estimated value of the driving voltage using the estimated value of the diaphragm relative speed, the input current, and a DC impedance of the loudspeaker at the present moment.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: July 16, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Hejinsheng Cao, Xiaotian Su
  • Patent number: 10341768
    Abstract: A speaker model may implement a direct voltage-to-excursion model in an adaptive filter for modeling the speaker without developing a first electrical-only model and then converting the model to a mechanical model. The voltage-to-excursion model may allow for modeling of different kinds of speakers, such as sealed, ported, or vented speakers. A transfer function may be developed in the adaptive filter for the voltage-to-excursion model, and that transfer function re-used for prediction of excursion values based on an audio signal. Speaker protection may be performed to take steps to prevent speaker damage when a predicted excursion value exceeds safe limits. The voltage-to-excursion model may operate in displacement or displacement-related domains (e.g., velocity and back emf).
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: July 2, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Rong Hu, Roberto Napoli, Jie Su
  • Patent number: 10341761
    Abstract: A portable audio system includes a housing defining a common acoustic cavity a woofer disposed at a first end of the housing in the common acoustic cavity and a tweeter disposed at a second end of the housing, opposite to the first end, in the common acoustic cavity facing the woofer. A waveguide is disposed in the common acoustic cavity between the woofer and the tweeter to separate the woofer and the tweeter. The waveguide disperses and distributes sound waves generated by the woofer and tweeter.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: July 2, 2019
    Assignee: Tymphany HK Limited
    Inventors: James Thompson, Kaili Wang
  • Patent number: 10313787
    Abstract: A predictive back-emf protection methodology for an electromechanical system, including a signal processor that processes a source signal to provide a modified source signal, a driver that converts the modified source signal to a drive signal, and an electromechanical transducer that generates, from the drive signal, a transducer response, and a back-emf signal coupled back to the driver output. A predictive back-emf generator (such as a routine in the signal processor) is characterized by a back-emf transfer function (linear parameterized model of the electromechanical transducer) for transforming an input signal into a transform back-emf representation of a back-emf signal predicted by the back-emf transfer function as a response of the electromechanical transducer to such input signal. The signal processor processes the source signal based on the transform back-emf representation to generate the modified source signal input to the driver.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: June 4, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Lars Risbo, Anker Bjørn-Josefsen, Kim N. Madsen
  • Patent number: 10291984
    Abstract: A speaker, a television provided with the speaker and a multimedia device are provided. The speaker includes a box body and a plurality of transducer units installed within the box body by means of parallel connection: front sound cavities of the plurality of transducer units are independent of each other, respectively; and the plurality of transducer units share one back sound cavity. The speaker possesses such advantages that it has a high sound pressure level output and a smaller power consumption, it is usable to reduce the back-cavity acoustic resistance, and it is usable to raise the lower frequency limit in the low frequency range.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: May 14, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE MULTIMEDIA TECHNOLOGY CO., LTD.
    Inventors: Yajun Li, Zeyang Fan, Yuanfeng Zhang, Xin Duan
  • Patent number: 10286320
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, a computing device having a controller to modify sound produced by a gaming application according to an otological profile of a user. Additional embodiments are disclosed.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: May 14, 2019
    Assignee: STEELSERIES ApS
    Inventors: Jacob Wolff-Petersen, Tino Soelberg, Ed Guntin
  • Patent number: 10291995
    Abstract: This application discloses various audio play control methods and apparatuses, and various electronic devices. One of the audio play control method comprises: determining play control information of a first audio that is being played or to be played by an electronic device, in response to that an acoustic part of the electronic device is blocked; and sending the play control information to play, according to the play control information, a corresponding audio through an acoustic part of at least another electronic device. This application can compensate for or replace an audio play sound effect of the electronic device through the at least another electronic device, thereby improving convenience when a user uses.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: May 14, 2019
    Assignee: BEIJING ZHIGU RUI TUO TECH CO., LTD.
    Inventor: Ran Xu
  • Patent number: 10257633
    Abstract: A sound-reproducing method that includes the steps outlined below is provided. A playback sound is generated by applying original audio into a test environment. The playback sound is received to generate received sound data. At least one test environment spatial parameter corresponding to the test environment is calculated according to known audio data related to the original audio and the received sound data. Input audio is modified by applying the test environment spatial parameter thereto to generate reproduced audio.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: April 9, 2019
    Assignee: HTC Corporation
    Inventors: Chi-Tang Ho, Li-Yen Lin, Tsung-Yu Tsai, Chun-Min Liao, Yan-Min Kuo
  • Patent number: 10244315
    Abstract: In various embodiments, a circuit arrangement includes a calibration filter set up to receive a signal based on a first signal and to provide a calibrated signal, the first signal being a signal which is provided by an analog/digital converter and is based on an analog signal, the analog signal being provided by at least one sensor of a sensor arrangement, a filter arrangement set up to receive a signal based on the first signal and to provide a second signal, and a controller set up to select a sensor-specific control signal dependent on the frequency response of the sensor from a plurality of control signals and to provide the calibration filter with said signal, the calibrated signal being based on the first signal and the sensor-specific control signal and corresponding or substantially corresponding to a predefined spectral mask in a predefined frequency range.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: March 26, 2019
    Assignee: Infineon Technologies AG
    Inventors: Dietmar Straeussnigg, Alessandro Caspani, Elmar Bach
  • Patent number: 10198242
    Abstract: A method and apparatus for controlling a volume of a device is provided herein. During operation, a first device will receive a volume-adjustment message from a second device, along with an identity of an active application being run on the second device. The volume-adjustment message indicates whether or not the second device increased or decreased their volume. The first device will increase or decrease their volume in a similar manner as the second device if the first device is currently running a same active application as the second device; otherwise the first device will adjust its volume in an opposite direction as indicated in the volume-adjustment message.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 5, 2019
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Yong-Gang Wan, Hai-Qing Hu, Xing Wei
  • Patent number: 10194241
    Abstract: Systems, devices, and methods are described for providing loudspeaker protection. An upstream loudspeaker model estimation component receives sensed electrical characteristics of a loudspeaker and generates an impedance model from which an excursion model, and associated parameters, of the loudspeaker as well as a gain change parameter may be generated. The impedance components are fitted to features of an estimated impedance, based on the voltage and current sense data, to generate the estimated impedance model that is converted to an excursion model of the loudspeaker. A downstream audio signal processing component, based on the excursion model, or parameters thereof, limits a predicted excursion of the loudspeaker utilizing excursion-constraining processing circuitry that includes a non-linear constraint filter. Processed audio signals associated with the limited excursion are subject to distortion suppression prior to releasing the output audio signals for playback on the loudspeaker.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 29, 2019
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventor: Jes Thyssen
  • Patent number: 10181831
    Abstract: A speaker driving apparatus can include: a sound pressure feedback unit configured to generate an electrical signal indicative of a sound pressure of a loudspeaker; a compensation unit configured to compensate an input audio signal according to the electrical signal indicative of the sound pressure of the loudspeaker to generate a compensated audio signal, where the sound pressure of the loudspeaker is linearly related to the input audio signal; and an amplification unit configured to amplify the compensated audio signal in order to drive the loudspeaker.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: January 15, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Hejinsheng Cao
  • Patent number: 10154359
    Abstract: Examples described herein involve calibrating a playback device. An example implementation receives, from a network microphone device (NMD), data indicating second audio signal detected by the NMD at multiple locations between a first physical location and a second physical location within a given environment while the network microphone device is moving from the first physical location to the second physical location, the second audio signal representing acoustic echo of a first audio signal played by a playback device. Based on the detected second audio signal, the implementation determines an audio characteristic of the given environment. Based on the determined audio characteristic, the implementation determines an audio processing algorithm to adjust audio output of the playback device in the given environment to have a pre-determined audio characteristic that is representative of desired audio playback qualities.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: December 11, 2018
    Assignee: Sonos, Inc.
    Inventor: Timothy W. Sheen
  • Patent number: 10149051
    Abstract: Systems, devices, and methods are described for providing loudspeaker protection. An upstream loudspeaker model estimation component receives sensed electrical characteristics of a loudspeaker and generates an impedance model from which an excursion model, and associated parameters, of the loudspeaker as well as a gain change parameter may be generated. The impedance components are fitted to features of an estimated impedance, based on the voltage and current sense data, to generate the estimated impedance model of the loudspeaker by combining the fitted impedance components. The resulting estimated impedance model is converted to an excursion model of the loudspeaker. A downstream audio signal processing component utilizes the excursion model, or parameters thereof, to limit a predicted excursion of the loudspeaker. Processed audio signals associated with the limited excursion are subject to distortion suppression prior to releasing the output audio signals for playback on the loudspeaker.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: December 4, 2018
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventor: Jes Thyssen
  • Patent number: 10142754
    Abstract: A signal from a sensor may be received indicative of an acceleration of a moving component of a transducer at a location where the sensor is mounted. A position the moving component may be determined based on the acceleration. The position of the moving component may be compared with a reference to output a measure of distortion associated with the transducer. Nonlinearities in audio output by the transducer may be corrected based on the measure of distortion.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: November 27, 2018
    Assignee: SONOS, INC.
    Inventors: Timothy W. Sheen, Simon Jarvis, Romi Kadri, Yean-Nian Willy Chen
  • Patent number: 10136234
    Abstract: One embodiment of the present invention sets forth a technique for calibrating an audio system. The technique includes transmitting information to a robotic vehicle for positioning a microphone at a plurality of different listening locations within a listening environment and, for each different listening location, acquiring a sound measurement via the microphone. The technique further includes calibrating at least one audio characteristic of the audio system based on the sound measurements acquired at the different listening locations.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: November 20, 2018
    Assignee: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED
    Inventors: Davide Di Censo, Stefan Marti, Jaime Elliot Nahman
  • Patent number: 10127921
    Abstract: An audio system is described that corrects for linear and nonlinear distortions. The system can include a physical loudspeaker system responsive to an audio input signal, an adaptive circuit, e.g., with a recurrent neural network, to correct for non-linear distortions from the loudspeaker.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: November 13, 2018
    Assignee: Harman International Industries, Incorporated
    Inventors: Ajay Iyer, Douglas J. Button
  • Patent number: 10089066
    Abstract: An electronic apparatus of an audio output system is provided. The electronic apparatus includes: a first communicator configured to transmit a first radio signal and receive a first response signal; a second communicator configured to transmit a second radio signal and receive a second response signal; and a processor configured to: determine a first distance between the first communicator and an audio output apparatus based on the first response signal, determine a second distance between the second communicator and the audio output apparatus based on the second response signal, determine a location of the audio output apparatus based on the first distance and the second distance; establish a communication connection with the audio output apparatus based on one from among the first response signal and the second response signal; and set a channel of the audio output apparatus based on the determined location of the audio output apparatus.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: October 2, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jeong-won Kang, Chang-seog Ko
  • Patent number: 10085095
    Abstract: A hearing aid system and method of operating the hearing aid system, wherein the impedance of a hearing aid receiver is measured, values of two hearing aid receiver parameters are derived based on the measurements, an electro-acoustical model of the receiver is provided using the derived values, the model is used to predict (i) a non-distorted membrane displacement based on the derived values of the parameters measured at a zero bias voltage, and (ii) a distorted membrane displacement based on the derived values of the parameters measured at a non-zero bias voltage, based on the predicted displacements, a compensation gain is determined suitable to compensate non-linear distortion of the hearing aid receiver, and the compensation gain is applied to the processing of a hearing aid input signal.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: September 25, 2018
    Assignee: Widex A/S
    Inventors: Lars Baekgaard Jensen, Joe Jensen, Christian Christiansen Burger
  • Patent number: 10080085
    Abstract: The invention provides a loudspeaker nonlinear compensation method. The method includes steps: obtaining system parameter of the loudspeaker, the No. i time-domain excitation voltage signal and the No. i state vector of the loudspeaker; compensating the No. i time-domain excitation voltage signal according to the system parameter and the No. i state vector and obtain i compensation voltage signal; obtaining the No. i+1 state vector according to the calculation of the system parameter and the No. i compensation voltage signal; outputting the No. i compensation voltage signal and record the quantity of the compensation voltage signal; judging whether the quantity of the compensation voltage signal is equal to the preset number value.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: September 18, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Yuxiang Hu, Jing Lu, Henglizi Zhang