Sound control unit and sound system

Details Sound control unit and sound system Sound control unit and sound system

2006-05-23

2006-05-23

Grier, Laura A. (Department: 2644)

Electrical audio signal processing systems and devices

Loudspeaker feedback

C381S058000, C381S059000

Reexamination Certificate

active

07050594

ABSTRACT:
A motional feedback (MFB) signal control unit includes a vibration displacement calculating part which generates a vibration displacement detecting signal in response to the input of a vibration detecting signal from a vibration detecting coil of a speaker unit, a vibration speed calculating part which generates a vibration speed detecting signal in response to the input of the vibration detecting signal, a processed signal generating part which generates a feedback signal in response to the input of the vibration displacement signal and the vibration speed detecting signal, and an adder which adds the feedback signal to a sound signal outputted from a sound reproducing unit so as to input the sound signal to a driving voice coil of the speaker unit.

REFERENCES:
patent: 5009281 (1991-04-01), Yokoyama
patent: 5197104 (1993-03-01), Padi
patent: 5542001 (1996-07-01), Reiffin
patent: 5588065 (1996-12-01), Tanaka et al.
patent: 5-183978 (1993-07-01), None
patent: 11-215587 (1999-08-01), None
patent: 2000-287293 (2000-10-01), None

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