41
Robert L Brennan, Edward Chau, Hamid Sheikhzadeh Nadjar, Todd Schneider: Directional audio signal processing using an oversampled filterbank. DSPFactory, Daniel J Santos, April 15, 2008: US07359520 (32 worldwide citation)

A directional signal processing system for beamforming information signals. The system includes an oversampled filterbank, which has an analysis filterbank for transforming the information signals in time domain into channel signals in transform domain, a synthesis filterbank and a signal processor. ...


42
Seefeldt Alan Jeffrey: Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal. Dolby Laboratories Licensing Corporation, Seefeldt Alan Jeffrey, GALLAGHER Thomas A, October 25, 2007: WO/2007/120453 (32 worldwide citation)

Audio signal processing relating to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for exam ...


43
David E Blackmer: Detection and monitoring device. DBX, Schiller and Pandiscio, January 8, 1980: US04182930 (31 worldwide citation)

An improved audio signal processing system synthesizes from an audio signal, an enhanced audio signal by sensing signal energy of the audio signal within a preselected frequency portion of the audio signal, dividing the sensed signal energy into a plurality of discrete bands according to the frequen ...


44
Leopold Neumann: Audio signal processing circuit for use in a hearing aid and method for operating same. Analogic Corporation, David W Gomes, July 14, 1987: US04680798 (30 worldwide citation)

In a hearing aid of the type having an electrical amplifier, wherein the improvement provides an audio signal processing circuit incorporated into the amplifier and including integral computing circuitry for controlling the operation thereof; the processing circuit providing circuitry for receiving ...


45
Dijkstra Evert, Hautier Olivier, Destrez Nicolas: System and method for separation of a users voice from ambient sound. Phonak, March 29, 2006: EP1640972-A1 (30 worldwide citation)

The invention relates to a system for separation of a user's voice from ambient sound, comprising a device (10) to be wom at the user's ear or at least partly in the user's ear canal (12) comprising a first microphone (M1) oriented outwardly towards the environment and a second microphone (M2) orien ...


46
Hisashi Kihara, Shinjiro Kato, Fumio Tamura, Shuichi Mori: Digital audio signal processing apparatus. Pioneer Electronic Corporation, Perman & Green, May 11, 1993: US05210806 (29 worldwide citation)

Disclosed herein is a digital audio signal processing apparatus of a type wherein a graphic equalizer including a plurality of filters connected in series to one another is subjected to arithmetic operation processing to be defined to thereby output the result of its processing as data therefrom. Wh ...


47
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system. Welsh & Katz, August 4, 1992: US05136651 (28 worldwide citation)

A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head micr ...


48
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system with optimal equalization. Welsh & Katz, December 4, 1990: US04975954 (28 worldwide citation)

A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head micr ...


49
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system. Welsh & Katz, July 23, 1991: US05034983 (28 worldwide citation)

A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head micr ...


50
Toshiyuki Kaji, Naomi Yamamoto, Toshihiro Nakane: Audio signal processing device. Kabushiki Kaisha Sega, Finnegan Henderson Farabow Garrett & Dunner L, April 11, 2006: US07027600 (27 worldwide citation)

The audio signal processing device of the present invention arranges objects in a virtual three-dimensional space and generates audio signals by performing, at a prescribed listening position, audio simulation to sounds generated from a prescribed sounding position. This invention is characterized i ...



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