Sound absorbers

Details Sound absorbers Sound absorbers

2006-11-21

2006-11-21

Martin, Edgardo San (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S290000, C181S296000, C296S039300

Reexamination Certificate

active

07137477

ABSTRACT:
The present invention relates to a sound absorber consisting of a first non-woven fabric facing towards the sound-emitting source having a layer thickness within a range of from 2 to 15 mm, a density within a range of from 50 to 500 kg/m3, a weight per surface area within a range of from 0.1 to 2.5 kg/m2, and a flow resistance within a range of from 50 to 1000 kNs/m4, and a second non-woven fabric facing away from the sound-emitting source has a layer thickness within a range of from 10 to 28 mm, a density within a range of from 20 to 100 kg/m3, a weight per surface area within a range of from 0.4 to 1 kg/m2, and a flow resistance within a range of from 10 to 40 kNs/m4.

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