Ear piece construction
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 25, 1986
Grant Date -
N/A
app pub date -
May 10, 1984
filing date -
May 26, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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