Patent
Audio signal mixing system
TLDR
An audio signal mixing system with left and right channels to transmit stereo and right signals, each containing monaural signals and each containing a microphone in the other channel with the stereophonic signals, is described in this article.Abstract:
An audio signal mixing system having left and right channels to transmit stereophonic left and right signals and each containing monaural signals and having left and right loudspeakers to reproduce the stereophonic signals, which includes a circuit for eliminating the monaural signal in one of the left and right channels, and also includes a mixing circuit for mixing a signal derived from a microphone in the other channel with the stereophonic signals, so that two different kinds of monaural signals as well as the stereophonic signals are reproduced by each loudspeaker.read more
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PatentDOI
High back EMF, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround
TL;DR: In this article, a small, compact subwoofer cabinet is presented with an annular magnet and a flexible spider attached to the first and second cages of the sub-cabinet.
PatentDOI
Auto voice changing apparatus
TL;DR: In this paper, an auto voice changing apparatus receives music from a stereo or multi-sound, digital or analog recording and either plays the recorded music as is, or uses the music as instrumental accompaniment by eliminating the vocal sounds from the reproduced music and substituting vocal sounds provided through a microphone.
Patent
Stereo mixing jack
TL;DR: In this paper, an adapter for interfacing between the output of a stereophonic sound source and a standard headphone set to suppress either the lead vocal and instrumental sound signals or in a second embodiment to suppress the left channel of a reproduced sound recording is presented.
Patent
Surround sound processor system
Paul R. Ambourn,Robert Stockman +1 more
TL;DR: In this paper, the authors proposed a wireless surround sound processor using an FM transmission link as opposed to hard wiring, which can take the stereo audio signal from a stereo VCR, a stereo receiver, a car stereo, or a stereo TV to produce a three dimensional sound field.
Patent
Audio fidelity amplifier and preamplifier systems
TL;DR: In this article, a preamplifier-amplusifier combination is proposed to eliminate hum in low-level switches by eliminating the feedback through the amplifier circuits, which can be used for mixing any of a plurality of input sources.
References
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Patent
Method and apparatus for simulating location and movement of sound
TL;DR: In this article, a method and system for generating or processing music or sound signal information to provide, in addition to the musical parameters of pitch, loudness, time, timbre, control over the apparent location and movement of the sound.