Acoustical earmuff

Details Acoustical earmuff Acoustical earmuff

1993-04-19

1995-05-30

Gellner, M. L.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

H04R 2500

Patent

active

054203813

ABSTRACT:
An earmuff cushion providing improved attenuation is described. The cushion is a foam material having a low static stiffness, and a high dynamic stiffness, which produces improved attenuation in the earmuff in which it is used. Earmuffs made from the cushion and improved methods of making the cushion and the earmuffs are also described.

REFERENCES:
patent: 2801423 (1957-08-01), Shaw et al.
patent: 4260575 (1981-04-01), Thew et al.
patent: 4465159 (1984-08-01), Stallings
patent: 4471496 (1984-09-01), Gardner, Jr. et al.
patent: 4682374 (1987-07-01), Geiser
patent: 4958697 (1990-09-01), Moody
patent: 5148887 (1992-09-01), Murphy

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