Bass reproduction speaker apparatus

Details Bass reproduction speaker apparatus Bass reproduction speaker apparatus

1995-05-23

1996-12-24

Isen, Forester W.

Electrical audio signal processing systems and devices

Loudspeaker feedback

381 59, H04R 300

Patent

active

055880657

ABSTRACT:
A bass reproduction speaker apparatus of the present invention includes: a cabinet with an opening, having a division member inside thereof; a speaker unit disposed at the division member; a passive radiator disposed in the opening; an amplifier for driving the speaker unit; a detector for detecting a vibration of a moving system of the speaker unit; and a feedback circuit for feeding back an output signal from the detector to the amplifier.

REFERENCES:
patent: 3798374 (1974-03-01), Meyers
patent: 3821473 (1974-06-01), Mullins
patent: 4550430 (1985-10-01), Meyers
patent: 4821328 (1989-04-01), Drozdowski
patent: 4989187 (1991-01-01), Yokoyama
patent: 5009281 (1991-04-01), Yokoyama
patent: 5010997 (1991-04-01), Furukawa
patent: 5033577 (1991-07-01), Veranth
patent: 5092424 (1992-03-01), Schreiber
patent: 5226089 (1993-07-01), Yoon et al.
patent: 5327504 (1994-07-01), Hobelsberger
European Search Report dated Apr. 20, 1993 for EP Application 92121580.2.
Yoshii, Nippon Onkyo Society Lecture Theses, Acoustis Research Lab., Onkyo Corporation, pp. 281-282, Oct. 1978, "Extreme Low Frequency Sound Reproduction by a Passive Radiator and an Acoustis Transformer".
M. Colloms, High Performance Loudspeakers, 4th Ed., Pentech Press Lts., pp. 123-126, 1991, "4.5 Bandpass Enclosure Designs".

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