Acoustical hearing protective devices utilizing dynamically stif

Details Acoustical hearing protective devices utilizing dynamically stif Acoustical hearing protective devices utilizing dynamically stif

1996-08-15

1998-08-11

Dang, Khanh

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181135, H04R 2500

Patent

active

057929980

ABSTRACT:
An earmuff cushion and other foam hearing protective components such as earplugs and pods for semi-aural hearing protectors and earplugs providing improved attenuation are described. The cushion and other foam hearing protective components are comprised of a dynamically stiff foam material having a low static stiffness, and a high dynamic stiffness, which produces improved attenuation in the earmuff and other hearing protective devices in which it is used. Earmuffs made from the cushion, semi-aural hearing protectors, earplugs, and improved methods of making the hearing protective devices are also described.

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