21
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system with loud speaker array. Welsh & Katz, July 26, 1994: US05333200 (63 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 ...


22
Ishido So, Matsumoto Masaharu, Miyasaka Shuji, Fujita Takashi, Katayama Takashi: Audio decoding apparatus, signal processing device, sound image localization device, sound image control method, audio signal processing device, and audio signal high-rate reproduction method used for audio visual equipment. Matsushita Electric Industrial, September 11, 2000: TW405328 (61 worldwide citation)

An audio decoding apparatus is provided for receiving a bit stream on a block-by-block basis, decoding one block of the bit stream to form decoded audio data for a plurality of channels, and storing the decoded audio data for each of the plurality of channels in a memory device, thereby down-mixing ...


23
Hans Leysieffer: Implantable hearing system with means for measuring its coupling quality. Cochlear, David B Safran, Nixon Peabody, April 29, 2003: US06554762 (58 worldwide citation)

An at least partially implantable system for rehabilitation of a hearing disorder comprising at least one acoustic sensor for picking up acoustic sensor signals and converting the acoustic sensor signals into corresponding electrical audio sensor signals; an electronic signal processing unit for aud ...


24
Michael A Gerzon: Audio signal processor providing simulated source distance control. Trifield Productions, Baker & Daniels, September 10, 1996: US05555306 (56 worldwide citation)

An audio signal processing system produces an output 24 having an illusory distance effect for a sound source signal S by feeding it via a direct signal path 25 and an indirect signal path 22, 23 passing through early reflection simulation apparatus 1 which feed an output mixing mechanism 9. A contr ...


25
Raimund Martin, Werner Hohn, Reinhard Kern: Programmable hearing aid. Siemens Augiologische Technik, Hill Steadman & Simpson, January 20, 1998: US05710820 (55 worldwide citation)

A hearing aid that has an analog part with a Class D final amplifier stage for audio signal processing, a digital part with an interface, a memory stage as well as supply stage for generating the voltage and control signals. The hearing aid has a utilized integrated circuit which also includes a pre ...


26
Tae hwa Jeong: Score evaluation display device for an electronic song accompaniment apparatus. Samsung Electronics, Sughrue Mion Zinn Macpeak & Seas, July 18, 1995: US05434949 (52 worldwide citation)

A score evaluation display device for an electronic song accompaniment apparatus has an audio signal processing unit to evaluate a user's singing. A sampling processor samples the difference between an input song signal from a microphone and reference song signal, a volume deference detector detects ...


27
Gregory Kramer: Digital signal processor for providing timbral change in arbitrary audio and dynamically controlled stored digital audio signals. Yield Securities, Brooks Haidt Haffner & Delahunty, February 5, 1991: US04991218 (52 worldwide citation)

A digital audio signal processing technique in which the harmonic content of the output signal varies with the amplitude of an input signal. The preferred embodiment includes an analog to digital converter with sample and hold, a digital signal memory with playback control apparatus, timing circuits ...


28
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system with optimal equalization. Welsh & Katz, March 20, 1990: US04910779 (51 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 accoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head mic ...


29
Yasuyuki Kino: Sound measuring apparatus and method, and audio signal processing apparatus. Sony Corporation, Wolf Greenfield & Sacks P C, May 24, 2011: US07949140 (50 worldwide citation)

A sound measuring apparatus for measuring a sound-arrival delay time from a speaker to a microphone on the basis of a result obtained by outputting a test signal from the speaker and picking up the test signal using the microphone includes the following elements. A control unit performs control so t ...


30
Kiyofumi Inanaga, Hiroyuki Sogawa, Yasuhiro Iida, Yabe Susumu: Audio signal reproducing apparatus. Sony Corporation, Hill Steadman & Simpson, February 27, 1996: US05495534 (50 worldwide citation)

In the audio signal reproducing apparatus, information on the transfer characteristics representative of the transfer characteristics from virtual sound sources to both ears of a listener in at least a first quadrant of the rotational angular position of the head M of the listener is stored in stori ...



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