Resonant electroacoustic transducer with increased band width re

Details Resonant electroacoustic transducer with increased band width re Resonant electroacoustic transducer with increased band width re

1979-07-23

1981-10-27

Brown, Thomas W.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179115R, 181159, 181160, 181192, 340388, G08B 310, H04R 128, H04R 130

Patent

active

042975387

ABSTRACT:
An electroacoustic transducer which includes a vibratile diaphragm operating at resonance has its narrow band width response characteristic increased by an order of magnitude by the use of a uniquely designed acoustic coupler in combination with the resonant diaphragm. The acoustic resistane presented to the resonant diaphragm by the acoustic coupler dominates the motional impedance characteristic of the transducer in the resonant frequency region of the vibratile diaphragm. The use of the inventive acoustic coupler reduces the Q of the vibrating system from a value in the order of 30 or more to the order of 8 or less.

REFERENCES:
patent: 1730425 (1929-10-01), Harrison
patent: 1917012 (1933-07-01), Blattner
patent: 3517390 (1970-06-01), Whitehead
patent: 3846792 (1974-11-01), Haigh
patent: 4006371 (1977-02-01), Quirke
patent: 4142186 (1979-02-01), Sweany et al.
patent: 4176731 (1979-12-01), Sinclair

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