Housing acoustical amplifier

Details Housing acoustical amplifier Housing acoustical amplifier

1979-09-05

1981-05-19

Cook, Daryl W.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181182, 181198, H04M 100, G10K 1100

Patent

active

042687187

ABSTRACT:
A portable receiver includes a housing which operates as an acoustical amplifier to increase the output level of the audio signals produced by a sound transducer. The sound transducer is located within a cavity in the housing and emits audio signals into the interior of the housing. The housing has vents located in its walls to permit the audio signals produced by the sound transducer to pass freely to the exterior of the housing. The vents are dimensioned such that the resonant frequency of the housing lies approximately at the center of the frequency range of the signals produced by the sound transducer. Matching the resonant frequency of the housing to the output signals of the transducer causes the housing to operate as a tuned resonator which amplifies the output signals of the transducer.

REFERENCES:
patent: 3037081 (1962-05-01), Carlsson
patent: 3449519 (1969-06-01), Mowry

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