Patents Examined by David L Ton
  • Patent number: 11564052
    Abstract: An example method of operation includes identifying a loudspeaker array profile defining characteristics of a loudspeaker array stored in memory, identifying a three-dimensional venue geometry value stored in the memory, defining virtual receivers to simulate acoustic characteristics within the venue geometry, defining a number of passive acoustic filter permutations to perform within a range of passive acoustic filter settings, and each passive acoustic filter setting is unique and has one or more passive acoustic filters to apply to one or more loudspeakers in the loudspeaker array, selecting performance criteria to apply to the loudspeaker array to represent its sound coverage uniformity at a given location throughout the venue geometry, calculating the performance criteria of the loudspeaker array via a passive acoustic filter setting selected from one or more of the passive acoustic filter permutations by performing a simulation with the passive acoustic filter settings, identifying an optimized passive
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: January 24, 2023
    Assignee: Biamp Systems, LLC
    Inventor: Xian Yu
  • Patent number: 11545125
    Abstract: An electronic system includes a fan module, an embedded controller, an error microphone, an active noise cancellation controller, and a micro speaker module. The error microphone is configured to output an error signal by detecting the noise level during the operation of the electronic system. According to the error signal and the fan information provided by the embedded controller, the active noise cancellation controller calculates the narrow-band noises associated with the actual single-blade fundamental frequency noise and the actual BPF fundamental frequency noise generated by the fan module, and drives the micro speaker module accordingly for providing a noise cancellation signal. The error signal may be reduced to zero by adaptively adjusting the noise cancellation signal for canceling the noises generated during the operation of the electronic system.
    Type: Grant
    Filed: November 16, 2021
    Date of Patent: January 3, 2023
    Assignee: ACER INCORPORATED
    Inventors: Jia-Ren Chang, Ruey-Ching Shyu
  • Patent number: 11546579
    Abstract: Display device ON/OFF detection methods and apparatus are disclosed. Example display activity detectors disclosed herein are to extract regions from respective ones of captured video frames, the regions corresponding to a depiction of a display of a monitored media device Disclosed example display activity detectors are also to compute a distance metric that is to represent an amount a first one of the regions of a first one of the captured video frames differs from a corresponding second one of the regions of a second one of the captured video frames. Disclosed example display activity detectors are further to compare the distance metric to a threshold to determine whether the monitored media device is ON or OFF.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: January 3, 2023
    Assignee: THE NIELSEN COMPANY (US), LLC
    Inventors: Christen V. Nielsen, Dan Nelson
  • Patent number: 11545949
    Abstract: Apparatus, systems, articles of manufacture, and methods for volume adjustment are disclosed herein. An example method includes collecting data corresponding to a volume of an audio signal as the audio signal is output through a device, when an average volume of the audio signal does not satisfy a volume threshold for a specified timespan, determining a difference between the average volume and a desired volume, and applying a gain to the audio signal to adjust the volume of the audio signal to the desired volume, the gain determined based on the difference between the average volume and the desired volume.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: January 3, 2023
    Inventors: Robert Coover, Jeffrey Scott, Markus K Cremer, Aneesh Vartakavi
  • Patent number: 11538451
    Abstract: A playback device is configured to receive, via a network interface, a source stream of audio including first and second channel streams of audio, and to produce, via respective first and second speaker drivers, a first channel audio output and a second channel audio output. The playback device is also configured to receive, via one or more microphones, a captured stream of audio including first and second portions corresponding to the respective first and second channel audio outputs. The playback device is also configured to combine at least the first channel stream of audio and the second channel stream of audio into a compound audio signal and perform acoustic echo cancellation on the compound audio signal and thereby produce an acoustic echo cancellation output, then to apply the acoustic echo cancellation output to the captured stream of audio and thereby increase a signal-to noise ratio of the captured stream of audio.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: December 27, 2022
    Assignee: Sonos, Inc.
    Inventors: Saeed Bagheri Sereshki, Romi Kadri
  • Patent number: 11533035
    Abstract: An example speaker for providing alerts includes: a housing and a cover forming an integrated unit; a microphone configured to sense an ambient noise level; and a processor configured to adjust a volume of the speaker based upon the ambient noise level. A hinge can be positioned between the housing and the cover to allow the cover to be pivoted relative to the housing from a close position to an open position.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: December 20, 2022
    Assignee: Federal Signal Corporation
    Inventors: Scott M. Cassidy, Lonnie E. Moravetz, Mark J. Dietel
  • Patent number: 11533574
    Abstract: A method is used for detecting whether a device is being worn, when the device comprises a first transducer and a second transducer. It is determined when a signal detected by at least one of the first and second transducers represents speech. It is then determined when said speech contains speech of a first acoustic class and speech of a second acoustic class. A first correlation signal is generated, representing a correlation between signals generated by the first and second transducers during at least one period when said speech contains speech of the first acoustic class. A second correlation signal is generated, representing a correlation between signals generated by the first and second transducers during at least one period when said speech contains speech of the second acoustic class. It is then determined from the first correlation signal and the second correlation signal whether the device is being worn.
    Type: Grant
    Filed: August 26, 2021
    Date of Patent: December 20, 2022
    Assignee: Cirrus Logic, Inc.
    Inventor: John P. Lesso
  • Patent number: 11514878
    Abstract: A method of using an acoustic resonator including receiving at a first stage of a resonator an incoming acoustic wave. The method further includes resonating the incoming wave with a flexible membrane, a taper of the flexible membrane, and a cavity of a first stage, thereby producing synergistic effect on a resulting acoustic resonance. Additionally, the method includes transforming an acoustic energy associated with the incoming acoustic wave into an elastic energy, wherein the elastic energy is channeled through the flexible membrane, thereby reducing an intensity of the incoming acoustic wave and resulting in a first reduced incoming acoustic wave. Further the method includes transferring the first reduced incoming acoustic wave through a hole of a neck of the flexible membrane. The method also includes transferring a first pressure wave caused by a perturbation in the flexible membrane into a second stage, thereby producing a second acoustic wave.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: November 29, 2022
    Assignee: Purdue Research Foundation
    Inventors: Fabio Semperlotti, Mehdi Jokar
  • Patent number: 11501209
    Abstract: In a behavior identification method, surrounding sound is acquired, a feature value that is specified by a spectrum pattern included in spectrum information generated from sound made by a person performing a predetermined behavior is extracted from the sound acquired, the predetermined behavior is identified by the feature value, and information indicating the predetermined behavior identified is output.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: November 15, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Kousuke Itakura, Ko Mizuno
  • Patent number: 11495241
    Abstract: Provided are an echo delay time estimation method and system thereof, wherein the echo delay time estimation method is executed by the echo delay time estimation system with the following steps: receiving a testing signal and a received signal and executing a time to frequency analysis to generate a testing signal spectrogram and a received signal spectrogram; respectively executing a characteristic signal dynamic detection calculation for the testing signal spectrogram and the received signal spectrogram to generate a testing signal characteristic dynamic vector and a received signal characteristic dynamic vector; executing a cross-correlated vector estimation for the testing signal characteristic dynamic vector and the received signal characteristic dynamic vector to generate a cross-correlated vector; and calculating an echo delay time according to the cross-correlated vector.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: November 8, 2022
    Assignee: QNAP Systems, Inc.
    Inventor: Wei-Wei Hsiung
  • Patent number: 11496851
    Abstract: Embodiments of the present invention are directed to a system and method for demonstrating spatial performance of a demonstration speaker model to consumers in order to evaluate different speakers. The system and method comprise a microphone array for recording the output of the demonstration speaker model. The system and method comprise acoustic input samples for processing to an acoustic output and a processor for determining characteristics of each microphone recording, and processing an acoustic input sample and characteristics of each microphone recording corresponding to a selected demonstration speaker model. The system and method further comprise a reference speaker model for outputting an acoustic signal based on the result of the processing.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: November 8, 2022
    Assignee: Crutchfield Corporation
    Inventors: William G. Crutchfield, Jr., Richard I. Wright
  • Patent number: 11496833
    Abstract: Various implementations include speaker systems. In one implementation, a self-powered speaker system includes: a first module, having: a processor; an audio signal and control connector coupled with the processor and enabling audio signal and control communication between the processor and another module in the speaker system; a dedicated power supply for the speaker system; a front end backup power supply; and a power connector coupled with the dedicated power supply and the front end backup power supply, the power connector enabling input power to the dedicated power supply and output power from the front end backup power supply.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: November 8, 2022
    Assignee: Bose Corporation
    Inventors: David Charles Gill, Benjamin Grant Karnavas, Jeffrey Alan Rocha, Curtis Rex Reed, Richard Gerald Ireland, Jr., James Kurt Mahan, Jeremy Lynn Garff
  • Patent number: 11488571
    Abstract: A system and method to prevent eavesdropping by a device. An anti-eavesdrop component is installed on the device. The anti-eavesdrop component is configured to actively prevent the device from capturing audio from the environment. In response to installing the anti-eavesdrop component, the device recognizes the anti-eavesdrop component as a primary audio input for the device. The anti-eavesdrop component then proceeds to block the device from capturing outside audio by injecting noise or otherwise interfering with the primary audio input.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: November 1, 2022
    Assignee: International Business Machines Corporation
    Inventors: Layne A. Berge, Jason J. Bjorgaard, John R. Dangler, Matthew Doyle, Thomas W. Liang, Kyle Schoneck, Matthew A. Walther, Jeffrey N. Judd, Henry Michael Newshutz, Matthew S Kelly
  • Patent number: 11488619
    Abstract: An adaptive dynamic audio hum extractor eliminates line frequency hum components and associated higher harmonics from an audio signal. An audio signal containing line frequency hum can be processed by providing dynamically controlled notch filters at the fundamental line frequency and additional harmonic multiples of the fundamental frequency. The audio signal is detected to provide dynamic control of the depth of the notch filters. Alternatively, an audio signal containing hum can be processed by dividing the spectrum into at least two frequency bands, an unaltered high band combined with a dynamically processed low band. The adaptive dynamically controlled notch filters vary the depth of the notches in relation to the envelope or time averaged level of the bandwidth limited audio signal. This allows masking of the hum components with higher levels of audio, thereby providing transparency devoid of audio path notches.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: November 1, 2022
    Inventors: James K. Waller, Jr., Jon J. Waller
  • Patent number: 11483648
    Abstract: A driver circuit of a capacitive speaker is provided. Positive and negative power terminals of a first output stage circuit are respectively coupled to a first power source and a second power source. The first output stage circuit outputs a first voltage signal to a first terminal of a capacitive load of the capacitive speaker according to a first audio input signal, a voltage of the first power source and a voltage of the second power source. Positive and negative power terminals of a second output stage circuit are respectively coupled to the second power source and a third power source. The second output stage circuit outputs a second voltage signal to a second terminal of the capacitive load of the capacitive speaker according to a second audio input signal, a voltage of the second power source and a voltage of the third power source.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: October 25, 2022
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventor: Ming-Hung Chang
  • Patent number: 11483655
    Abstract: Various aspects include active noise reduction (ANR) devices and approaches, one approach including: receiving an input signal representing audio captured by a feedforward microphone of an ANR headphone; receiving an error signal representing audio captured by an error measurement sensor; generating an anti-noise signal configured to reduce a noise signal over a frequency range; and applying a gain to at least one of the input signal or the anti-noise signal over the frequency range based on the error signal, where the gain is calculated by: filtering the anti-noise signal over the frequency range to generate a filtered feedforward signal, and filtering the error signal over the frequency range to generate a filtered error signal; estimating a feedforward path contribution to the error signal; and determining the gain based on a correlation between the filtered error signal and the filtered feedforward signal with the assigned feedforward path contribution to the error signal.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: October 25, 2022
    Assignee: Bose Corporation
    Inventors: Michael P. O'Connell, Joseph H. Cattell, Dale Ian McElhone
  • Patent number: 11483645
    Abstract: An acoustic transducer comprises a transducer substrate, and an aperture having a non-circular perimetral shape defined through the transducer substrate. A diaphragm is disposed on the transducer substrate and coupled to a surface of the transducer substrate via at least one diaphragm anchor such that a gap is defined between the diaphragm and the transducer substrate, and an outer periphery of the diaphragm extends radially outwards of a rim of the aperture such that a portion of the diaphragm overhangs the aperture.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: October 25, 2022
    Assignee: Knowles Electronics, LLC
    Inventors: Jeremy Johnson, Yenhao Chen
  • Patent number: 11463052
    Abstract: In an embodiment, a method for shaping a PWM signal includes: receiving an input PWM signal; generating an output PWM signal based on the input PWM signal by: when the input PWM signal transitions with a first edge of the input PWM signal, transitioning the output PWM signal with a first edge of the output PWM signal; and when the input PWM signal transitions with a second edge before the first edge of the output PWM signal transitions, delaying a second edge of the output PWM signal based on the first edge of the output PWM signal.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: October 4, 2022
    Assignees: STMicroelectronics S.r.l., STMicroelectronics (Shenzhen) R&D Co. Ltd.
    Inventors: Hong Wu Lin, Giovanni Gonano, Edoardo Botti
  • Patent number: 11462206
    Abstract: An apparatus of generating a sound of a vehicle includes a motor configured to generate a torque of a rotational component and a torque of a vibration component, based on a target driving current, a controller configured to generate the target current by synthesizing a first signal for generating the torque of the rotational component and a second signal for generating the torque of the vibration component, and determine the target driving current for driving the motor based on the target current, and a sound output device to generate a target sound due to the torque of the vibration component.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: October 4, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Kyoung Jin Chang
  • Patent number: 11457307
    Abstract: A headphone driver is used to drive a headphone apparatus, which includes a first differential driver, a first positive output terminal, a first negative output terminal, and a second negative output terminal. The first positive output terminal is connected to the first terminal. A switch unit is disposed on a feedback path at the first negative output terminal and the second negative output terminal, to enable the first/second negative output terminal in feedback as a close loop to output to the third/fourth terminal and disable the second/first negative output terminal at a first/second operation state. The first differential driver includes a first positive voltage driving circuit, a first negative voltage driving circuit, and a second negative voltage driving circuit, respectively providing the first positive output terminal, the first negative output terminal, and the second negative output terminal.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: September 27, 2022
    Assignee: MACRONIX INIERNATIONAL CO., LTD.
    Inventor: Hsiao-Ming Lin