Chamber for testing acoustical transmission loss...

Details Chamber for testing acoustical transmission loss... Chamber for testing acoustical transmission loss...

G - Physics

01

N

349/35

G01N 29/00 (2006.01) G01H 3/00 (2006.01)

Patent

CA 1182898

-14- ABSTRACT Acoustical transmission loss of sheet materials in the low frequency range is measured by utilizing a cylindrical test chamber containing a speaker directed towards the upper end to which the sheet material is mounted. Pressure gradient microphones are mounted on either side of the sheet material and are connected to electronic circuitry for responsively indicating the transmission loss measurement across said sheet material.

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