BS ISO 10534-2 : 98 AMD 13701

Name: BS ISO 10534-2 : 98 AMD 13701
Brand: BSI

Superseded

View Superseded by

ACOUSTICS - DETERMINATION OF SOUND ABSORPTION COEFFICIENT AND IMPEDANCE IN IMPEDANCE TUBES - TRANSFER-FUNCTION METHOD

Superseded date

11-04-2002

Published date

23-11-2012

Publisher

British Standards Institution

Contents
1. Scope
2. Definitions and symbols
3. Principle
4. Test equipment
5. Preliminary test and measurements
6. Test specimen mounting
7. Test procedure
8. Precision
9. Test report
Annexes
A Preliminary measurements
B Procedure for the one-microphone technique
C Pressure-release termination of test sample
D Theoretical background
E Error sources
F Determination of diffuse sound absorption coefficient
of locally reacting absorbers from the results of this
part of ISO 10534
G Bibliography

Defines the use of an impedance tube, two microphone locations and a digital frequency analysis system for the determination of the sound absorption coefficient of sound absorbers for nominal sound incidence. It can also be applied for the determination of the acoustical surface impedance or surface admittance of sound absorbing materials. Since the impedance ratios of a sound absorptive material are related to its physical properties, such as airflow resistance, elasticity and density, porosity, measurements described in this test method are useful in basic research and product development.

Committee	EH/1
DevelopmentNote	Renumbered and Superseded by BS EN ISO 10534-2 (05/2002)
DocumentType	Standard
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN ISO 10534-2:2001