Ear pad construction for earphones
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United States of America Patent
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-
Mar 7, 1989
Grant Date -
N/A
app pub date -
Nov 14, 1986
filing date -
Nov 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ear pad for earphones comprises a foam-like material formed into a pad enclosing the user's ear in use in order to expand the essentially linear frequency response of a good earphone so that it brings also the lowest still audible frequencies into the linear region, and simultaneously with the expansion of the transmission range of the earphone, to make the reproduction of stereophonic acoustic events more natural. The ear pad is advantageously shaped and made of open-cell elastic foam material having on its inner and/or its outer side or in its interior so as to be disposed in the sound path from the coupling space outward, at least one passive membrane supported for vibration and having a natural resonance which lies in the range of the lower frequencies.
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