Acoustic apparatus

Details Acoustic apparatus Acoustic apparatus

1989-03-30

1991-04-02

Fuller, Benjamin R.

Acoustics

Diaphragm

With resonant chamber

181156, 381 96, 381159, H04R 700

Patent

active

050040669

ABSTRACT:
In an acoustic apparatus in which a vibrator which drives a Helmholtz resonator having an open port by one surface thereof and directly radiates an acoustic wave from the other surface thereof is arranged in the Helmholtz resonator, the open port is arranged coaxially with the vibrator, and the vibrator is driven to cancel an air counteraction from the resonator when the resonator is driven. According to this construction, the acoustic apparatus can be rendered compact and the clear sound localization can be realized.

REFERENCES:
patent: 2518805 (1950-08-01), Mussa
patent: 3037081 (1962-05-01), Carlsson
patent: 3821473 (1974-06-01), Mullins
patent: 3944757 (1976-03-01), Tsukamoto
patent: 4180706 (1979-12-01), Bakgaard
patent: 4567959 (1986-02-01), Prophit
patent: 4790407 (1988-12-01), Yamamoto et al.

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