Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1986-11-14
1989-03-07
Fuller, Benjamin R.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181132, 381183, 381187, H04R 2500
Patent
active
048098116
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.
REFERENCES:
patent: 3117575 (1964-01-01), Carrell et al.
patent: 3602329 (1971-08-01), Bauer et al.
patent: 4005278 (1977-01-01), Gorike
patent: 4160135 (1979-07-01), Gorike
patent: 4572324 (1986-02-01), Fidi et al.
AKG Akustische u.Kino-Gerate Gesellschaft m.b.H.
Fuller Benjamin R.
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