Loudspeaker device

Details Loudspeaker device Loudspeaker device

1987-08-06

1989-12-19

Yusko, Donald J.

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

381 98, 381 99, 381101, H04R 304, H04R 502

Patent

active

048888117

ABSTRACT:
A loudspeaker device comprises an input circuit for obtaining an input signal to be sounded by a loudspeaker as a digital signal, a phase correction circuit for correcting the digital signal in phase, a loudspeaker drive circuit for producing a loudspeaker drive signal in accordance with the digital signal which has been phase-corrected by the phase correction circuit, and loudspeakers driven by the loudspeaker drive signal. The phase correction circuit consists of a digital filter capable of determining sound pressure-frequency characteristics and frequency-phase characteristics independently from each other. By determining the two characteristics in such a manner that, for example, the sound pressure-frequency characteristics will become flat and the phase-frequency characteristics will become linear, naturalness in hearing can be improved.

REFERENCES:
patent: 4421949 (1983-12-01), Eberbach
patent: 4423289 (1983-12-01), Swinbanks
patent: 4429181 (1984-01-01), Freadman
patent: 4458362 (1984-07-01), Berkovitz et al.

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