Earmuff for noise blocking

Details Earmuff for noise blocking Earmuff for noise blocking

1998-10-16

1999-12-07

Neas, Michael A.

Apparel

Head coverings

Convertible

181129, 128867, A61F 1114

Patent

active

059961236

ABSTRACT:
A noise blocking earmuff is described, which has a better noise blocking ability and which is more comfortable than prior earmuffs. The earmuff includes a cup-shaped shell (20), a cushion (22) that surrounds the open inner end of the shell and which presses against the head of the wearer, and an inside sound-absorber (26) lying in the shell. The cushion is formed of slow recovery material which has a rebound of no more than about 10 percent, to more comfortably and completely conform the cushion to the area of the wearer's head that the cushion presses against. The inside sound absorber includes a layer (50) of resilient felted foam for blocking higher frequency sounds, and a layer (52) of unfelted foam for blocking lower frequency sounds, to obtain a better overall noise blocking capability.

REFERENCES:
patent: 4774938 (1988-10-01), Leight
patent: 4852683 (1989-08-01), Killion
patent: 4856118 (1989-08-01), Sapiejewski
patent: 4905322 (1990-03-01), Aileo et al.
patent: 5020163 (1991-06-01), Aileo et al.

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