1
J P Fricke, Ulrich R Muller: System for reproducing sound information. Flynn & Frishauf, December 6, 1977: US04061874 (39 worldwide citation)

In an environment of acoustic noise, such as a car radio playing in traffic or engine noise, both the volume (AGC) and dynamic range (Compression) of the audio amplifier are controlled by a local ambient acoustic noise sensor, such that gain is increased and dynamic range decreased simultaneously wi ...


2
BONGIOVI ANTHONY: SYSTEME ET PROCEDE DE TRAITEMENT DE SIGNAL NUMERIQUE, SYSTEM AND METHOD FOR DIGITAL SIGNAL PROCESSING. BONGIOVI ACOUSTICS, BONGIOVI ACOUSTICS, FETHERSTONHAUGH & CO, September 5, 2017: CA2785743 (2 worldwide citation)

The present invention provides for methods and systems for digitally processing an audio signal. In various embodiments, a method comprises receiving a profile comprising a plurality of filter equalizing coefficients, configuring a plurality of filters of a graphic equalizer with the plurality of fi ...


3
John Usher, Steven Goldstein: Method and device to maintain audio content level reproduction. Personics Holdings, Pablo Meles, October 7, 2014: US08855343 (2 worldwide citation)

An earpiece and method to control a level of audio reproduction within an occluded ear canal are provided. The method includes the steps of measuring an ambient sound level from an Ambient Sound Microphone (ASM) at an entrance to an occluded ear canal, measuring a residual background noise level wit ...


4
Larry V Craig, Michael T Burk: Audio system including multiband audio dynamics processor. Panasonic Automotive Systems Company of America Division of Panasonic Corporation of North America, Laurence S Roach Esq, October 6, 2015: US09154097 (1 worldwide citation)

An audio system includes a level controller receiving an input audio signal from an audio medium. The level controller includes a gain adjust module producing an output audio signal based on the input audio signal. A filter arrangement is communicatively coupled to the level controller. The filter a ...


5
Ryotaro Aoki, Hideyuki Tokuhisa: Audio signal processing device with enhancement of low-pitch register of audio signal. Yamaha Corporation, Rossi Kimms & McDowell, October 21, 2014: US08868414 (1 worldwide citation)

An audio signal processing device is designed to enhance the low-pitch register of an audio signal by generating harmonics causing a missing fundamental effect with a light load of processing but without damaging an audio waveform. The audio signal processing device includes a filtering part (e.g. a ...


6
POTARD Guillaume: Procédé et système pour réguler une distorsion dans une bande de fréquence critique de signal audio, Method and system for controlling distortion in a critical frequency band of an audio signal. Dolby Laboratories Licensing Corporation, POTARD Guillaume, Dolby Laboratories, February 23, 2012: WO/2012/024144 (1 worldwide citation)

In some embodiments, a method and system for controlling distortion of the output of a miniature speaker by attenuating critical frequency band of the input signal to be reproduced, using tuning parameters that have been predetermined where the critical frequency band is a frequency range of the spe ...


7
TECHNIQUES FOR DISTORTION REDUCING MULTI-BAND COMPRESSOR WITH TIMBRE PRESERVATION. May 31, 2018: US20180152166-A1

Distortion reducing multi-band compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal l ...


8
Peter Grosche, Yue Lang, Qing Zhang: Digital compressor for compressing an audio signal. Huawei Technologies, Conley Rose P C, May 29, 2018: US09985597

A digital compressor for compressing an input audio signal is presented. The digital compressor comprises a compression gain control for providing a compression gain parameter, and a compression parameter determiner for determining a compression ratio from the compression gain parameter. The compres ...


9
Alan J Seefeldt: Techniques for distortion reducing multi-band compressor with timbre preservation. Dolby Laboratories Licensing Corporation, April 3, 2018: US09935599

Distortion reducing multi-hand compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal l ...


10
Aalbert De Vries, Mojtaba Farmani: Hearing aid with probabilistic hearing loss compensation. GN Hearing, Vista IP Law Group, November 28, 2017: US09832562

A hearing aid includes: an input transducer for provision of an audio signal in response to sound; a hearing loss model for calculation of a hearing loss as a function of a signal level of the audio signal; and a probabilistic hearing loss compensator that is configured to process the audio signal i ...