Audio speaker system

Details Audio speaker system Audio speaker system

1992-06-24

1995-07-04

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 59, H04R 300

Patent

active

054308020

ABSTRACT:
A speaker system includes a controller for driving a loudspeaker. The controller includes a sensor for detecting the present physical position of the speaker. The controller receives this position data as input, along with an audio signal to be reproduced. Using the audio signal as position data, the controller compares it with the actual sensed position data and generates an error signal. An error amplifier uses this error signal to drive the speaker, so that the speaker cone position matches the audio position defined in the audio data. In this manner, the speaker is driven by the error signal rather than the audio signal. In a preferred embodiment, the audio signal and position data are provided as digital signals, and the controller calculates the error signal in a digital signal processor.

REFERENCES:
patent: 4327250 (1982-04-01), von Recklinghausen et al.
patent: 4610024 (1986-09-01), Schulhof
patent: 4739513 (1988-04-01), Kunugi et al.
patent: 4752960 (1988-06-01), Scholz
patent: 4823391 (1989-04-01), Schwartz
patent: 4852176 (1989-07-01), Truhe
Dorf, Richard C., Modern Control Systems, Jan. 1992, pp. 573-576.

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