Soundproof cover and method for producing the same

Details Soundproof cover and method for producing the same Soundproof cover and method for producing the same

2010-09-17

2011-11-22

Phillips, Forrest M (Department: 2832)

Acoustics

Sound-modifying means

Housing or enclosure

C181S210000, C181S284000, C181S286000, C181S290000

Reexamination Certificate

active

08061475

ABSTRACT:
The present invention relates to a soundproof cover containing: a sound-absorbing material disposed facing to a sound source; a soft sound-insulating layer laminated on the sound-absorbing material and having an air permeability measured according to JIS L 1018 (1999) of 10 cc/cm2·sec or less; and a soft cover forming an air layer with the soft sound-insulating layer and having a Young's modulus measured according to JIS K 7127 (1999) of 0.2 to 1.5 GPa, in which the air layer is hermetically sealed.

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Nagamatsu, Akio, “Generation Mechanism of Viscosity by Energy Principle”, Automotive Technology, vol. 63, No. 7, 2009, pp. 56-61.

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