Loudspeaker with high frequency motional feedback

Details Loudspeaker with high frequency motional feedback Loudspeaker with high frequency motional feedback

1983-10-19

1986-02-25

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 59, 1791155VC, H04R 300

Patent

active

045731896

ABSTRACT:
A moving-coil loudspeaker system incorporating motional feedback operable at high frequencies, i.e. above about 1000 Hz. The feedback signal is developed by a tiny piezo-electric accelerometer mounted together with a charge amplifier directly on the loudspeaker coil, in alignment with the turns of the coil. The coil comprises two layers of rectangular, anodized aluminum wire wound tightly to form an effectively integral mass. The system includes a suitable stabilizing frequency compensation network.

REFERENCES:
patent: 3525812 (1970-08-01), Verdier
patent: 3530244 (1970-09-01), Reiffin
patent: 3941932 (1976-03-01), D'Hoogh
patent: 4180706 (1979-12-01), Bakgaard
patent: 4207430 (1980-06-01), Harada et al.
patent: 4243839 (1981-01-01), Takahashi et al.
patent: 4256923 (1981-03-01), Meyers
patent: 4276443 (1981-06-01), Meyers

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