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Foam material sound absorption

  • US 4,584,232 A
  • Filed: 09/13/1984
  • Issued: 04/22/1986
  • Est. Priority Date: 01/20/1983
  • Status: Expired due to Fees
First Claim
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1. A sound absorbing member comprisinga first open cell foam panel,a second open cell foam panel,a fiber grid insert disposed between said panels,a bonding substance which bonds said grid fibers together and bonds said first and second panels to said grid insert,said panels being compacted under heat and pressure to provide an acoustical impedance of from 20 to 120 rayls.

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