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Acoustic evaluation of thermal insulation

  • US 4,672,851 A
  • Filed: 05/30/1986
  • Issued: 06/16/1987
  • Est. Priority Date: 05/30/1986
  • Status: Expired due to Fees
First Claim
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1. A method for measuring the density, thickness, and thermal conductivity of an insulation layer in an attic space above a ceiling comprising inserting at least one probe through a small aperture in the ceiling having transducer means thereon for transmitting and receiving acoustical signals, transmitting an acoustic signal from a first transducer through the insulation material to a second transducer and calculating the density, thickness, and thermal conductivity of the insulation by comparing the measurement of the received signal with standard values for the same type of insulation.

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