Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent
1983-06-03
1985-03-05
Hickey, R. J.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Hearing aid
181144, 381 89, 381 90, H04R 502
Patent
active
045035539
ABSTRACT:
The disclosure relates to an audio signal reproduction system having one or more of the following features: (1) a loudspeaker having (a) a flat frequency response and (b) a predetermined power response; (2) two loudspeakers adapted to be positioned relative to one another so that they reproduce a stereophonic image substantially independent of the listener's position along a listening line spaced from the loudspeakers and nonintersecting a line extending between the two speakers; (3) an improved cross-over network having a substantially constant input impedance as a function of frequency; (4) a power sensor for sensing the power applied to a transducer so that audio signals are transmitted over a first signal path through the system when the sensed power is above a predetermined minimum level, and over a second path when the sensed power falls below the minimum level; (5) a power monitoring circuit to prevent a loudspeaker driver from being overdriven; and (6) a circuit for substantially balancing the signal energy levels between two audio channels over a long period of time.
REFERENCES:
patent: 2915588 (1959-12-01), Bose
patent: 3720787 (1973-03-01), Ishii
patent: 3759345 (1973-09-01), Borisenko
patent: 3914549 (1975-10-01), Bose
patent: 3983333 (1976-09-01), Allison
patent: 4058675 (1977-11-01), Kobayashi et al.
patent: 4100371 (1978-07-01), Bayliff
patent: 4410063 (1983-10-01), Yasue et al.
Meyer, David G., "Development of a Model for Loudspeaker Dispersion Simulation", AES Convention, Oct. 23-27, 1982.
Schuck, Peter L., "Design of Optimized Loudspeaker Crossover Networks Using a Personal Computer", AES Conv., Oct., 1982.
DBX Inc.
Hickey R. J.
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