Perceived sound

Details Perceived sound Perceived sound

1991-04-11

1993-07-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Binaural and stereophonic

381 22, 381 24, 381 27, H04R 500

Patent

active

052280853

ABSTRACT:
A stereo audio system includes a plurality of drivers and a signal processor circuit. The signal processing circuit has at least a left channel input and a right channel input, and provides at least one processed signal on at least one output. The processed signal is characterized by a coefficient of proportionality representative of complex components of the signals on the left channel input and the right channel input. The coefficient of proportionality is at a maximum and minimum for the complex components on the left channel input and the right channel input being in phase opposition and phase coherence, respectively. Each of the signals on the left channel input, the right channel input, and the at least one output are received by at least one of the drivers, and each of the drivers receives at least one of the left channel input signal, the right channel input signal, and the processed signal. Each of the drivers produces an acoustic output that corresponds to a combination of all inputs received by the driver. The acoustic outputs produced by the drivers forms a combined acoustic output in a first direction and a combined acoustic output in at least a second direction transverse to the first direction. The ratio of the combined acoustic output in the first direction relative to the combined acoustic output in the second direction is at a maximum and minimum when the coefficient of proportionality is at a minimum and maximum, respectively.

REFERENCES:
patent: 3892624 (1975-07-01), Shimada
patent: 5005201 (1991-04-01), Rumreich et al.
patent: 5027403 (1991-06-01), Short et al.

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