Ear piece construction

Details Ear piece construction Ear piece construction

1984-05-10

1986-02-25

Fuller, Benjamin R.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179156R, H04R 2500

Patent

active

045723249

ABSTRACT:
An ear piece for a sound producing device such as a headset comprises an annular ear cushion with at least one part of an elastic, soft, sound permeable foam and at least one other part of a sound permeable layer which is thin in relation to the overall thickness of the air cushion and has a defined acoustic impedance for low and medium frequencies of the audibility range. The ear cushion acts as a frictional resistance with a central portion defining coupling space from the sound producing device to the ear and representing an acoustic connection through the sound producing device to the air.

REFERENCES:
patent: 3134456 (1964-05-01), Wadsworth
patent: 3456263 (1969-07-01), Aileo
patent: 4437538 (1984-03-01), Ohlsson et al.
Rhenius, "Optimal Offene Kopfhorer", Funkschau (hi-fi), No. 23, 1978, pp. 1159-1161.

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