Acoustic apparatus

Details Acoustic apparatus Acoustic apparatus

1990-01-22

1993-02-23

Dwyer, James L.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

181156, 181155, 181160, H04R 2500, H04R 700, H05K 500

Patent

active

051897067

ABSTRACT:
An acoustic apparatus comprises an inner cabinet, a vibrator mounted thereon and an outer cabinet. The inner cabinet and the outer cabinet constitute an acoustic cabinet having a closed cavity. The outer cabinet covers the inner cabinet with a predetermined gap formed between the inner peripheral surface of the outer cabinet and the outer peripheral surface of the inner cabinet and has an opening causing the gap to communicate with the external region of the acoustic cabinet and to function as a resonance port. The resonance port and the closed cavity constitute a resonator. The vibrator is provided so as to face the closed cavity. The resonator radiates a resonant sound from the open end of the gap, i.e., the resonance port, upon being driven by the vibrator.

REFERENCES:
patent: 3529691 (1970-09-01), Wesemann
patent: 3912866 (1975-10-01), Fox
patent: 4146111 (1979-03-01), Mae et al.
patent: 4210223 (1980-07-01), Gillum et al.
patent: 4230905 (1980-10-01), Crum et al.
patent: 4298087 (1981-11-01), Launay
patent: 4549631 (1985-10-01), Bose
patent: 4733749 (1988-03-01), Newman et al.
patent: 4783820 (1988-11-01), Lyngdorf et al.
patent: 4949386 (1990-08-01), Hill

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