Acoustic treatment performance testing

Details Acoustic treatment performance testing Acoustic treatment performance testing

1999-10-04

2000-12-05

Moller, Richard A.

Measuring and testing

Vibration

By mechanical waves

73574, 73575, 73866, G01N 2900

Patent

active

061551163

ABSTRACT:
A method and system for acoustic treatment performance testing in a free-ld acoustic environment is provided. A sound source directs a gated acoustic pulse at an acoustic treatment. Acoustic pressures of the gated acoustic pulse and reflected energy from the acoustic treatment are measured from a location approximately in-line with the source and the acoustic treatment. This measurement location is at least one-half the wavelength of the frequency of interest away from the source and is at least a distance equal to (t*c/2) away from the acoustic treatment where t is equal to the duration of the gated acoustic pulse and c is equal to the speed of sound in the free-field acoustic environment. The acoustic pressures of the gated acoustic pulse and reflected energy are compared as an indication of performance of the acoustic treatment at a frequency of interest.

REFERENCES:
patent: 3589174 (1971-06-01), Bauke
patent: 4577503 (1986-03-01), Imaino et al.
patent: 5143072 (1992-09-01), Kantorvich et al.

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