Method and system for conducting an on-site measurement of...

Details Method and system for conducting an on-site measurement of... Method and system for conducting an on-site measurement of...

2007-08-14

2007-08-14

Chapman, John E. (Department: 2856)

Measuring and testing

Specific gravity or density of liquid or solid

C073S589000

Reexamination Certificate

active

11032761

ABSTRACT:
Method for conducting an on-site measurement of a density value of an insulation material is provided, comprising: (a) providing an acoustic source for emitting a sound wave; (b) directing the sound wave emitted from the acoustic source through a waveguide and at an insulation material present in a wall, floor or ceiling cavity; (c) measuring a sound pressure in the waveguide to obtain at least one sound pressure measurement; and (d) calculating a density value of the insulation material based on the at least one sound pressure measurement.

REFERENCES:
patent: 4672851 (1987-06-01), Blessing et al.
patent: 6047518 (2000-04-01), Lytle
patent: 6968740 (2005-11-01), Tinianov
ASTM International, Standard Test Method for Impedence and Absorption of Acoustical Materials Using A Tube, Two Microphones and A Digital Frequency Analysis System.
M.E. Delany, E,N. Bazley, Acoustical Properties of Fibrous Absorbent Materials, National Physical Laboratory, Teddington, Middlesex, Gt. Britain.

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