Tonal Noise Or Particular Frequency Or Band Patents (Class 381/71.14)
  • Patent number: 10438579
    Abstract: According to one embodiment, a rotating blade noise reduction device for reducing noise from a flight vehicle including rotating blades, the device includes loudspeakers, one or more reference microphones, an estimator, and a processor. The loudspeakers are arranged coaxially in a circumferential form for each of the rotating blades. The reference microphones acquire noise generated from the rotating blades and control sounds generated from the loudspeakers. The estimator estimates angular frequencies of the rotating blades. The processor generates control signals so as to reduce sound pressures at the reference microphones, delays the control signals by time delays corresponding to the loudspeakers dependent on installation angles between the loudspeakers arranged coaxially in a circumferential form from a circle center, the angular frequencies estimated, and a number of the loudspeakers, and inputs the control signals to the loudspeakers.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 8, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuhiko Goto, Akihiko Enamito
  • Patent number: 10403262
    Abstract: An active noise control device reduces noise inside a cabin of a car. The active noise control device includes: a controller that decreases a signal level of a canceling signal when a signal level of a received reference signal is lower than a threshold; and a threshold controller that changes the threshold based on at least one of a signal level of an error signal and information on the car.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: September 3, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Mitsuhiro Tani
  • Patent number: 10365763
    Abstract: A display device comprises a sensing subsystem configured to detect one or more conditions associated with touch input to the display device occurring via a contact of an input object at a surface of the display device. The display device further comprises a microphone system configured to receive sound, a logic machine, and a storage machine holding instructions. The instructions are executable by the logic machine to determine, based on the one or more conditions, a time of the contact; determine, based on at least the time of the contact, some characteristics of the contact; and generate an audio output via applying a selective attenuation to process sound received into the microphone system. The selective attenuation is selected based on the sonic characteristics and applied over a time interval beginning at the determined time of contact.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: July 30, 2019
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Sean M. Donnelly, Jason D. Wilson, Denis Varlamov, Eric Immel
  • Patent number: 10339912
    Abstract: Estimated output signals of the reference signals are generated using an estimated filter path transfer function that provides an estimated effect on sound waves traversing a physical path, the estimated filter path transfer function performing processing according to a diagonalization matrix and reference signals. Anti-noise signals are generated from the reference signals using an adaptive filter driven by learning unit signals received from a learning algorithm unit, the learning unit signals based in part on error output signals generated from the estimated output signals, the anti-noise signals including signals per sound zone and per reference signal, each sound zone including a microphone and one or more loudspeakers. A sum across references is performed on the anti-noise signals to generate a set of output signals per sound zone. The set of output signals are processed by the diagonalization matrix to generate a set of output signals per loudspeaker.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: July 2, 2019
    Assignee: Harman International Industries, Incorporated
    Inventors: Tingli Cai, Markus E. Christoph
  • Patent number: 10283135
    Abstract: Suppression of tapping noise caused by tapping an acoustically coupled touchscreen. When a tapping event is detected on the touchscreen, a tapping noise suppressor is alerted of the event, and responds by at least temporarily mitigating the tapping noise in the audio stream. The suppression occurs temporarily for at least part of the duration of surge in audio levels that occurs as a result of the tapping event, and in a manner that reduces the psychoacoustic impact on the conversation. Suppression may be performed by first placing the tapping noise suppressors in an alert mode when a tapping event occurs. The tapping noise suppressor then monitors the audio stream generated by the microphone for the beginning of the tapping event—which will be represented in the form of a surge in volume. The tapping noise suppressor then temporarily applies the suppression window.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: May 7, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Kevin Juho Venalainen, Sylvain Angrignon
  • Patent number: 10210856
    Abstract: A noise control system for a ducted rotor assembly, the ducted rotor assembly including a hub, a duct, and two or more blades coupled to the hub and supported by the duct. The noise control system including a microphone configured to receive a sound input generated by the ducted rotor assembly, the microphone configured for association with the hub; a speaker unit configured to generate a cancellation noise, the speaker configured for association with the hub; and a controller operably connected to the microphone and the speaker unit, the controller configured to selectively adjust harmonics of the cancellation noise to reduce an acoustic signature of the ducted rotor assembly. In another aspect, there is provided a rotorcraft with a ducted rotor assembly in a tail portion including a noise control system. In a third aspect, there is a method of reducing an acoustic signature of a ducted rotor assembly.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: February 19, 2019
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Levi C. Hefner, Frank B. Stamps
  • Patent number: 10198066
    Abstract: A remote controlling device is disclosed that includes one or more motion sensors configured to sense a motion of the device. The remote control further includes a capacitive sensor and a power source. The capacitive sensor selectively couples the power source to the one or more motion sensors.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: February 5, 2019
    Assignee: DISH Technologies L.L.C.
    Inventor: William R. Reams
  • Patent number: 10183110
    Abstract: The invention relates to a method and a device for monitoring a vascular access during an extracorporeal blood treatment. The method and the device according to the invention are based on the monitoring of the difference between the venous pressure measured by a venous pressure sensor and the arterial pressure measured by an arterial pressure sensor (in the extracorporeal blood circuit. According to the method and the device according to the invention, a test function describing disturbances in the extracorporeal blood circuit is determined. Said test function is used to determine a noise-free differential pressure from the measured venous and arterial pressure, said differential pressure being evaluated in an arithmetic and evaluation unit to identify a defective vascular access.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: January 22, 2019
    Assignee: Fresenius Medical Care Deutschland GmbH
    Inventor: Pascal Kopperschmidt
  • Patent number: 10089973
    Abstract: A noise cancelation device that programs, records, and saves sounds and noises and their respective sound waves, inverts them, and broadcasts the inverted sound waves, thereby reducing, deadening, canceling, or eliminating, the original sounds and noises, and their respective sound waves. Further, the noise cancelation device can save sounds and noises that have a constant, predictable, steady, and recognizable sound quality and their respective sound waves, and preprogram the respective inverted sound waves, which allows for the noise cancelation device to broadcast the preprogrammed inverted sound waves through speakers to reduce, deaden, or cancel the original sounds and noise when they are present. The noise cancelation device is portable and may be used in any location desired, or the noise cancelation device may be is fixed in its location.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: October 2, 2018
    Inventor: Edward Villaume
  • Patent number: 10083709
    Abstract: The noise suppression method of individual active noise reduction system comprises the steps that: (1) initial noise digital signals are received and converted to serve as input signals of a BP neural network; (2) the input signals are processed to generate secondary digital signals; (3) the secondary digital signals are output to a loudspeaker and secondary noise is generated; (4) remained noise digital signals obtained by overlapping the initial noise and the secondary noise are received; whether remained noise digital signals is continuously constant for the set times is judged; if yes, the secondary digital signals are kept outputting; (5) if not, BP neural network parameters are optimized and adjusted with the amplitude of the remained noise digital signals being minimum as the optimality principle; remained noise digital signals of previous step are served as new input signals and the step (2) is executed again.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: September 25, 2018
    Assignees: STATE GRID JIANGSU ELECTRIC POWER COMPANY NAN JING POWER SUPPLY COMPANY, STATE GRID JIANGSU ELECTRIC POWER COMPANY, STATE GRID COMPANY CORPORATION OF CHINA, HOHAI UNIVERSITY
    Inventors: Ning Jiang, Hongzhong Ma, Kai Li, Honghua Xu, Chunning Wang, Bingbing Chen, Hongyu Jiang
  • Patent number: 10056066
    Abstract: A noise reducing sound reproduction system comprises a loudspeaker that is connected to a loudspeaker input path and that radiates noise reducing sound. A microphone is connected to a microphone output path and picks up the noise or a residual thereof. An active noise reduction filter is connected between the microphone output path and the loudspeaker input path, and the active noise reduction filter comprises at least one shelving filter.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: August 21, 2018
    Assignee: Harman Becker Automotive Systems GmbH
    Inventors: Markus Christoph, Johann Freundorfer, Thomas Hommel
  • Patent number: 10002602
    Abstract: A noise-reducing fan system, comprising a motor, a fan body, a plurality of magnetic-inducing elements, a magnetic field generator and a noise-reducing sound source device, is provided. Here, the fan body is mounted on the motor. The fan body comprises a plurality of blades, on which the plurality of magnetic-inducing elements are disposed, respectively. The magnetic field generator, which may generate a magnetic field, is employed for driving the plurality of magnetic-inducing elements to vibrate the plurality of blades and generate a vibration sound, so that at least one portion of the noise emitted from the fan body as rotating may be counterbalanced. The noise-reducing sound source device is disposed on a predetermined position and may send out a noise-reducing sound, so that the noise-reducing sound may counterbalance at least the other portion of the noise emitted from the fan body as rotating.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: June 19, 2018
    Assignee: CORETRONIC CORPORATION
    Inventors: Shang-Hsuang Wu, Chih-Cheng Chou
  • Patent number: 9955250
    Abstract: A personal audio device including multiple output transducers for reproducing different frequency bands of a source audio signal, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal for each of the transducers from at least one microphone signal that measures the ambient audio to generate anti-noise signals. The anti-noise signals are generated by separate adaptive filters such that the anti-noise signals cause substantial cancelation of the ambient audio at their corresponding transducers. The use of separate adaptive filters provides low-latency operation, since a crossover is not needed to split the anti-noise into the appropriate frequency bands. The adaptive filters can be implemented or biased to generate anti-noise only in the frequency band corresponding to the particular adaptive filter. The anti-noise signals are combined with source audio of the appropriate frequency band to provide outputs for the corresponding transducers.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: April 24, 2018
    Assignee: CIRRUS LOGIC, INC.
    Inventors: Jon D. Hendrix, Jeffrey Alderson, Ali Abdollahzadeh Milani, Dayong Zhou, Yang Lu
  • Patent number: 9922635
    Abstract: One embodiment provides a method, including: detecting, using one or more audio capture devices, nuisance audio; receiving, from one or more device sensors, contextual information; determining a mitigating audio signal based on the nuisance audio and contextual information; thereafter, emitting, from one or more audio source devices, mitigating audio into an interior space. Other aspects are described and claimed.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 20, 2018
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Aaron Michael Stewart, Rod D. Waltermann
  • Patent number: 9906201
    Abstract: There is described herein a real-time scheme, implementable in software, hardware, or a combination thereof, to detect a resonating frequency of a structure from a sensed signal and dynamically set the center frequency of an adaptive compensator for effective attenuation of the resonating frequency.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: February 27, 2018
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Poi Loon Tang, Teuvo Saario, Reza Pedrami
  • Patent number: 9855893
    Abstract: Generating an audio signal with a configurable distance cue includes the following: receiving an input audio signal that has at least one signal characteristic that contributes to a listener's auditory distance perception; receiving a distance control signal; and changing at least one characteristic in accordance with a distance control signal that is representative of the perceived distance.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: January 2, 2018
    Assignee: Harman Becker Automotive Systems GmbH
    Inventor: Markus Christoph
  • Patent number: 9790961
    Abstract: A blower and a method for decreasing eddy noise are provided. The blower includes a fan frame, a fan wheel, at least one induction element and a coil. The fan frame has in inlet and an outlet. The fan wheel is disposed in the fan frame and has a wheel hub and a plurality of fan blades connected to periphery of the wheel hub. The induction elements are fixed to the corresponding fan blades, the coil is disposed on the fan frame for driving the at least one induction element, such that the fan blade corresponding to the induction element swing back and forth to generate a vibration sound, and the vibration sound is counteracted with eddy noise generated when the fan wheel rotates. Moreover, the method for decreasing eddy noise is also provided.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: October 17, 2017
    Assignee: CORETRONIC CORPORATION
    Inventors: Shang-Hsuang Wu, Jhih-Hao Chen
  • Patent number: 9734814
    Abstract: A noise reducing sound reproduction system comprises a loudspeaker that is connected to a loudspeaker input path and that radiates noise reducing sound. A microphone is connected to a microphone output path and picks up the noise or a residual thereof. An active noise reduction filter is connected between the microphone output path and the loudspeaker input path, and the active noise reduction filter comprises at least one shelving filter.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 15, 2017
    Assignee: Harman Becker Automotive Systems GmbH
    Inventors: Markus Christoph, Johann Freundorfer, Thomas Hommel
  • Patent number: 9723119
    Abstract: An information handling system has a haptic generation module to generate haptic effects including haptic noise and a haptic noise reduction module. The haptic noise reduction module receives characteristics of sound representative of haptic noise generated by a haptic generation module of a device and entering an audio input module of the device, the characteristics including frequencies and timing. It also detects the generation of haptic effects, the generations occurring after the receiving characteristics. It also reduces the effects of haptic noise on digital data representing audio input to the device based upon the received characteristics of the sound. It may reduce the effects by subtracting amplitudes of audio waves representing the haptic noise from amplitudes of audio waves representing the audio input.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 1, 2017
    Assignee: DELL PRODUCTS, LP
    Inventors: Douglas J. Peeler, Richard W. Schuckle
  • Patent number: 9613613
    Abstract: An active acoustic control method for attenuating disturbing narrow-band noise with at least one counter-noise loudspeaker and at least one error microphone in a space forming a material electroacoustic system, the method implementing, in a computing element, a control law with an internal model and disturbance observer with a model of the electroacoustic system, previously obtained by an identification method. The current configuration of the electroacoustic system can vary over time, a nominal configuration of the electroacoustic system is previously determined, a corresponding nominal model Mo(q?1) or Mo(k) previously identified, the control law with an internal model and disturbance observer is implemented in real time, a modifier block ?(q?1) or ?(k) is applied to and associated with the nominal model, and the nominal model remains the same during the variations of the current configuration of the electroacoustic system, and the modifier block is varied in real time during these variations.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: April 4, 2017
    Assignee: IXBLUE
    Inventor: Bernard Vau
  • Patent number: 9520743
    Abstract: A remote controlling device (100) is disclosed that includes one or more motion sensors (120, 130, 140) configured to sense a motion of the device. The remote control further includes a capacitive sensor (150) and a power source (405). The capacitive sensor selectively couples the power source to the one or more motion sensors.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: December 13, 2016
    Assignee: ECHOSTAR TECHNOLOGIES L.L.C.
    Inventor: William R. Reams
  • Patent number: 9467773
    Abstract: There is provided an electronic device 1 that allows a user to listen to vibration sound that is transmitted when a vibrator 10 held in a housing 60 is pressed against the user's body and a part of the use's body is vibrated. The electronic device 1 has a microphone 7 and vibrates the vibrator 10 based on ambient sound collected by the microphone 7.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: October 11, 2016
    Assignee: KYOCERA Corporatiion
    Inventor: Tomohiro Inagaki
  • Patent number: 9426570
    Abstract: An audio processing device includes a setting section that sets a reproduction sampling frequency Fplay and a recording sampling frequency Frec higher than Fplay, a digital-to-analog converter that based on Fplay converts a sound source signal that is a digital signal into a reproduction signal that is an analog signal, an analog-to-digital converter that based on Frec converts a recording signal that is an analog signal converter into an input signal that is a digital signal, a signal separator that separates the input signal into a low region signal contained in a band of less than Fplay and a high region signal contained in a band of the Fplay and higher, and a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: August 23, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takeshi Otani, Taro Togawa, Chisato Ishikawa, Masanao Suzuki
  • Patent number: 9311909
    Abstract: Sounds sensed by a microphone of a device include sounds from a cooling fan of the device that varies based on the speed of the cooling fan, and other sounds used by a program of the device such as voice inputs. The sound level of sounds used by the program is determined, and the speed of the fan is adjusted so that a desired cooling level is attained while keeping the fan speed low enough that the noise from the fan does not interfere with the sounds used by the program.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: April 12, 2016
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Edward C. Giaimo, III, Yi He, Duane Martin Evans, Andrew D. Delano
  • Patent number: 9118405
    Abstract: A system to suppress sound emerging from speakers and the generation of same at a distance is presented. This system includes devices to handle audio which when manipulated, in their different applications, are capable of reducing or of eliminating the acoustic impact or sound unwanted by people or by the environment. The present system includes a combination of known devices to handle audible signals or sound that allow for the analysis of the characteristics or specifications of sound or for the generation of an identical signal which can be inverted and mixed with the output signal to cancel sound and at the same time to suppress the inverted signal at a distance and in this way to once again generate sound at a distance. Considering the above, the scope of the present invention falls within the scope of the universe to transmit, mix, and suppress sound.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: August 25, 2015
    Inventors: Alberto Cornejo Lizarralde, Michael A. Digregorio
  • Patent number: 9082392
    Abstract: A method and apparatus for active noise canceling. The method includes retrieving an input sample from at least one of a feedback or feedforward microphone digitized through the sigma-delta converter, retrieving the input sample and a related filter, wherein the filter is customized to the particular headset, outputting a filtered signal through a speaker without any interpolation and reducing order of CIC filters, and outputting a response sharply tapered down.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: July 14, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Nitish Krishna Murthy, Supriyo Palit, Edwin Randolph Cole, Jorge Francisco Arbona Miskimen
  • Patent number: 8949120
    Abstract: Systems and methods for controlling adaptivity of noise cancellation are presented. One or more audio signals are received by one or more corresponding microphones. The one or more signals may be decomposed into frequency sub-bands. Noise cancellation consistent with identified adaptation constraints is performed on the one or more audio signals. The one or more audio signals may then be reconstructed from the frequency sub-bands and outputted via an output device.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: February 3, 2015
    Assignee: Audience, Inc.
    Inventors: Mark Every, Ludger Solbach, Carlo Murgia, Ye Jiang
  • Publication number: 20150003628
    Abstract: Methods and systems are provided for enhancing listening intelligibility in electronic devices. A vibration sensor may be used to generate feedback corresponding to vibrations caused by the outputting of the acoustic signals, and the feedback may be used in adjusting the listening intelligibility stage. In some instances, a microphone may be used to obtain audio input corresponding to ambient noise affecting intelligibility of audio outputted, as acoustic signals, via a speaker, to a user. The audio input may be used to control a listening intelligibility stage applied to audio content when the acoustic signals are generated for outputting by the speaker. In particular, the listening intelligibility stage may comprise application of dynamic time-scale modifications.
    Type: Application
    Filed: June 25, 2014
    Publication date: January 1, 2015
    Inventor: Yaakov Chen
  • Publication number: 20140355777
    Abstract: Provided is an electronic device that is capable of reducing sound leakage from a vibration plate vibrated by a piezoelectric element. An electronic device 1 of the present invention includes: a piezoelectric element 30; and a vibration plate 10 configured to be vibrated by the piezoelectric element 30. Vibration sound is transmitted by the vibration plate vibrating a part of a human body. The piezoelectric element 30 is vibrated using a processed sound signal in which at least a part of frequency components of a sound reproduction signal that are higher than a predetermined threshold value is cut or attenuated.
    Type: Application
    Filed: April 12, 2013
    Publication date: December 4, 2014
    Applicant: Kyocera Corporation
    Inventors: Toshihisa Nabata, Satoshi Mizuta, Tomoaki Miyano, Kiyokazu Sato, Akio Kihara, Shun Kazama, Yasuhiro Katayama
  • Patent number: 8879747
    Abstract: An audio system with at least one audio channel may include a digital audio processor in which at least one digital filter is implemented for each channel. The digital filter of each channel may include: an analysis filter bank configured to receive a broad-band input audio signal and divide the input audio signal into a plurality of sub-bands, a sub-band filter for each sub-band, and a synthesis filter bank configured to receive the filtered sub-band signals and combine them for providing a broad-band output audio signal. A delay is associated with each sub-band signal, the delay of one of the sub-band signals being applied to the broad-band input audio signal upstream of the analysis filter bank and the residual delays being applied to the remaining sub-band signals downstream of the analysis filter bank.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: November 4, 2014
    Assignee: Harman Becker Automotive Systems GmbH
    Inventor: Markus Christoph
  • Patent number: 8855329
    Abstract: An active noise control (ANC) system may be implemented to both sides of a fan, such that both directions of the noise emitting are treated to reduce the overall noise. The impact on airflow is minimal, and the technique is very effective in a broad range of low frequencies. Passive sound-absorbing materials may be included for attenuation of high frequencies. The resulting quiet fan produces a low level of noise compared to any other device based on fan, which produces the same capacity of airflow. The quiet fan may be incorporated in any mechanical system which requires airflow induction such as: computers, air conditioners, machines, and more.
    Type: Grant
    Filed: January 20, 2008
    Date of Patent: October 7, 2014
    Assignee: Silentium Ltd.
    Inventors: Alon Slapak, Tzvika Fridman, Ofira Rubin
  • Patent number: 8836516
    Abstract: Health-sensing and health-action devices and systems are generally described. The health-sensing device may include one or more of a sensor, a filter, and a transmitter. The sensor may be configured to sense one or more factors relating to an indicator of a health related condition or occurrence such as snoring and may include one or more microphone devices, accelerometers, and/or MEMs devices. The filter may be configured to evaluate a signal from the sensor and determine if the indicator has been detected. The transmitter may be arranged for initiating a transmission based on a signal from the filter. The health-action device may be configured for responding to an indicator of a health related condition or occurrence of a user and may include one or more of a receiver, a processor, and a responder. The health-action device may stimulate the user or may cancel the snoring sound.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: September 16, 2014
    Assignee: Empire Technology Development LLC
    Inventors: Andrew Wolfe, Thomas Martin Conte
  • Publication number: 20140241539
    Abstract: A system for noise removal is coupled to a signal unit that provides a digital signal. The noise removal system includes a transformation module to transform the digital signal into an f-digital signal, a threshold filter to generate a noiseless signal from the f-digital signal based on a threshold profile, and a signal synthesizer to provide a gain to the noiseless signal and to transform the noiseless signal into an output signal.
    Type: Application
    Filed: May 6, 2014
    Publication date: August 28, 2014
    Applicant: STMicroelectronics International N.V.
    Inventors: Ankur BAL, Anupam JAIN, Rakhel Kumar PARIDA
  • Patent number: 8761408
    Abstract: A signal processing apparatus includes: one or more detection means for detecting movement of a diaphragm of a speaker in correspondence with feedback methods that are different feedback methods; analog-to-digital conversion means for converting one or more detection signals acquired by the detection means into a digital form; feedback signal generating means for generating feedback signals corresponding to the feedback methods using the digital detection signals; synthesis means for combining an audio signal to be output as a driving signal of the speaker with the feedback signals; correction equalizer means for setting an equalizing characteristic to allow a sound reproduced by the speaker to have a target frequency characteristic by changing the digital audio signal; feedback operation setting means for setting feedback methods in which a feedback operation up to combining the audio signal with the feedback signal is performed and the feedback operation is not performed equalizing characteristic changing a
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: June 24, 2014
    Assignee: Sony Corporation
    Inventors: Michiaki Yoneda, Taro Nakagami
  • Patent number: 8682000
    Abstract: A method and a device for suppressing noise in the passenger compartment of a vehicle, which include at least one transducer, a programmable computer, at least one acoustic sensor, the computer being configured such as to apply an electro-acoustic model of the passenger compartment to a correcting system model including a central controller with fixed coefficients joined to a block of variable coefficients, including a Youla parameter in the form of a Youla block Q. The first phase includes determining and calculating the electro-acoustic model and the control law for at least one predetermined noise frequency. In a second phase, in real time, the computer applies the control law to the electro-acoustic model in accordance with the current frequency of the noise to be suppressed.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: March 25, 2014
    Assignee: Ixblue
    Inventor: Bernard Vau
  • Publication number: 20130343558
    Abstract: This method comprises steps of: a) partitioning (10, 16) the spectrum of the noisy signal into a HF part and a LF part; b) operating denoising processes in a differentiated manner for each of the two parts of the spectrum with, for the HF part, a denoising by prediction of the useful signal from one sensor to the other between sensors of a first sub-array (R1), by means of a first adaptive algorithm estimator (14), and, for the LF part, a denoising by prediction of the noise from one sensor to the other between sensors of a second sub-array (R2), by means of a second adaptive algorithm estimator (18); c) reconstructing the spectrum by combining together (22) the signals delivered after denoising of the two parts of the spectrum, respectively; and d) selectively reducing the noise (24) by an Optimized Modified Log-Spectral Amplitude gain, OM-LSA, process.
    Type: Application
    Filed: June 11, 2013
    Publication date: December 26, 2013
    Applicant: PARROT
    Inventors: Charles Fox, Guillaume Vitte, Maurice Charbit, Jacques Prado
  • Patent number: 8611553
    Abstract: Apparatus and method of an ANR circuit detecting instances of instability in at least the provision of feedback-based ANR, monitoring audio that includes feedback anti-noise sounds for acoustic output by an acoustic driver for a sound having characteristics indicative of instability including at least a frequency within a range of frequencies and an amplitude reaching at least a predetermined minimum amplitude, and perhaps also a sinusoidal waveform.
    Type: Grant
    Filed: April 25, 2010
    Date of Patent: December 17, 2013
    Assignee: Bose Corporation
    Inventors: Pericles Nicholas Bakalos, Jason Harlow
  • Patent number: 8611552
    Abstract: Robust feedforward active noise cancellation is provided which can overcome or substantially alleviate problems associated with the diverse and dynamic nature of the surrounding acoustic environment. A multi-faceted analysis is performed to determine the direction (or directions) of propagation of noise in the surrounding acoustic environment. The direction of propagation is then utilized to determine direction-dependent characteristics of the acoustic path between a reference position where the noise is captured and a desired position where the noise is to be cancelled. These characteristics are used to form a feedforward signal adapted to cancel the noise at the desired position. By forming the feedforward signal based on direction-dependent characteristics of the acoustic path, the techniques described herein can achieve optimal noise cancellation at the desired location, regardless of the direction of propagation of the noise.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: December 17, 2013
    Assignee: Audience, Inc.
    Inventors: Carlo Murgia, Carlos Avendano, Jean Laroche
  • Publication number: 20130322643
    Abstract: A robust noise reduction system may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. The system may receive acoustic signals from two or more microphones in a close-talk, hand-held or other configuration. The received acoustic signals are transformed to frequency domain sub-band signals and echo and noise components may be subtracted from the sub-band signals. Features in the acoustic sub-band signals are identified and used to generate a multiplicative mask. The multiplicative mask is applied to the noise subtracted sub-band signals and the sub-band signals are reconstructed in the time domain.
    Type: Application
    Filed: August 5, 2013
    Publication date: December 5, 2013
    Inventors: Mark Every, Carlos Avendano, Ludger Solbach, Ye Jiang, Carlo Murgia
  • Patent number: 8600070
    Abstract: A signal processing apparatus includes a signal transforming unit transforming a first sound signal obtained by dividing a sound signal represented by a time function and by the predetermined time width into a second sound signal represented by a frequency function; a calculating unit determining a third sound signal which has a reduced influence of the operation sound by using the second sound signal and a sound signal representing the operation sound; a correcting unit performing a correction, by setting a sound signal representing the target sound as a reference signal, on the third sound signal based on the reference signal; and a signal inverse transforming unit inverse-transforming a sound signal on which the correction is performed from the sound signal represented by the frequency function into the sound signal represented by the time function.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: December 3, 2013
    Assignee: Nikon Corporation
    Inventors: Tsuyoshi Matsumoto, Mitsuhiro Okazaki
  • Patent number: 8577051
    Abstract: According to one embodiment, a sound signal compensation apparatus includes an input module, a compensation module, and an output module. The input module receives identification information identifying a first frequency with regard to a resonance of an ear closed by an earphone or headphone. The compensation module performs first compensation emphasizing a second frequency on a sound signal, the second frequency being determined based on the identification information or the first frequency. The output module outputs the compensated sound signal. The compensation module is configured to perform the first compensation emphasizing the second frequency, at which emphasis is greater than or equal to 2 dB and less than or equal to 12 dB.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: November 5, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kimio Miseki, Norikatsu Chiba, Yasuhiro Kanishima
  • Patent number: 8532310
    Abstract: Apparatus and method of controlling provision of ANR, possibly of a personal ANR device, in which amplitudes of a piece of audio employed in the provision of ANR are monitored, and the compression of one or both of feedback and feedforward ANR reference sounds is made dependent on frequency such that a first sound of one frequency need only reach a lower amplitude to trigger compression, while a second sound of another frequency must reach a higher amplitude to trigger compression.
    Type: Grant
    Filed: April 25, 2010
    Date of Patent: September 10, 2013
    Assignee: Bose Corporation
    Inventors: Daniel M. Gauger, Jr., Ricardo F. Carreras, Jason Harlow
  • Patent number: 8520861
    Abstract: A processing system generates an output signal which includes desired signal components, and reduces or eliminates tonal noise. The output signal may be provided to any subsequent signal processing system, including voice recognition systems, pitch detectors, and other processing systems. The subsequent processing systems are less likely to mistake tonal input signal noise for desired signal content, to needlessly consume computational resources to analyze noise, and to take spurious actions induced by the tonal noise.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: August 27, 2013
    Assignee: QNX Software Systems Limited
    Inventors: Phillip A. Hetherington, Alex Escott
  • Patent number: 8488807
    Abstract: An audio signal compensation device includes: a signal processor configured to perform filtering on an input audio signal; a filter coefficients storage module configured to store a plurality of filter coefficients; a user interface configured to provide options for a determination of filter coefficients to a user and to obtain a selection result from the user; and a filter coefficients determining module configured to determine a set of filter coefficients among the plurality of filter coefficients based on the selection result.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: July 16, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Norikatsu Chiba, Kimio Miseki, Yasuhiro Kanishima, Kazuyuki Saito, Toshifumi Yamamoto, Takashi Fukuda
  • Patent number: 8472637
    Abstract: Apparatus and method of reducing the provision of ANR at an one end of a range of frequencies at which the ANR is provided without reducing the provision of the ANR at the other end of the range of frequencies by repeatedly reconfiguring coefficients of one or more digital filters to reduce the provision of ANR at the one end in increments at a first recurring interval, and then later reversing the reduction in the provision of the ANR at the one end by repeatedly reconfiguring coefficients of the one or more digital filters in increments at a second recurring interval.
    Type: Grant
    Filed: April 25, 2010
    Date of Patent: June 25, 2013
    Assignee: Bose Corporation
    Inventors: Ricardo F. Carreras, Daniel M. Gauger, Jr.
  • Patent number: 8452022
    Abstract: Disclosed herein is a digital filter circuit for producing a noise reduction signal for reducing noise based on a noise signal outputted from a microphone which collects the noise, including: an analog/digital conversion section; a first digital filter section; an arithmetic operation processing section; a second digital filter section; and a digital/analog conversion section. The first digital filter section and/or the second digital filter section are configured such that a predetermined attenuation amount is obtained within a predetermined range in the proximity of a sampling frequency around the sampling frequency.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: May 28, 2013
    Assignee: Sony Corporation
    Inventor: Kohei Asada
  • Patent number: 8447046
    Abstract: The present invention discloses a circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system. It mainly comprises a first resistor (R1); a capacitor (Cout); a first switch (SW1); a second switch (SW2); a soft start device; a first feedback amplifier; and a second feedback amplifier. By using the three-stage of power-on sequence, the present invention can effectively suppress the pop noise when the audio driver is power on.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: May 21, 2013
    Assignee: ISSC Technologies Corp.
    Inventors: Hsin-Chieh Huang, Yi-Lung Chen
  • Patent number: 8411873
    Abstract: A noise control device eliminates a possibility that a noise arriving at a control point is increased as compared to a case where noise control is not performed and has a reduced circuit scale. The device includes a controlling noise detector for detecting a given noise to output a controlling noise signal, a controlling filter section for signal-processing the controlling noise signal, by using a preset fixed filter coefficient, to output a control signal, and a control speaker for reducing the given noise, by emitting toward the control point a control sound based on the control signal. The device also includes a noise determination section for determining whether the given noise is a noise corresponding to the fixed filter coefficient, and an output control section for stopping output of the control signal from the controlling filter section when the given noise does not correspond.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: April 2, 2013
    Assignee: Panasonic Corporation
    Inventor: Hiroyuki Kano
  • Patent number: 8392199
    Abstract: A clipping detection device calculates an amplitude distribution of an input signal for each predetermined period, calculates a deflection degree of the distribution on the basis of the calculated amplitude distribution, and then detects clipping of a communication signal on the basis of the calculated deflection degree of the distribution.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: March 5, 2013
    Assignee: Fujitsu Limited
    Inventors: Takeshi Otani, Masakiyo Tanaka, Yasuji Ota, Shusaku Ito
  • Patent number: 8379872
    Abstract: A talk-through system for hearing protectors such as headphones, helmets, earplugs and the like, in which separate left and right microphones are controlled by separate left and right switches. The microphones allow ambient sound to be heard by the wearer of the hearing protector, and normally the wearer hears audio from both microphones in the appropriate ears. Pushing a switch causes the audio from the ear on which the switch is mounted to be enhanced and, preferably, switched to both ears. Various arrangements of control logic are provided such that activation of a switch can cause changes in audio processing.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: February 19, 2013
    Assignee: Red Tail Hawk Corporation
    Inventor: John W. Parkins