Standard Swedish standard · SS-EN ISO 10534-2

Acoustics - Determination of sound absorption coefficient and impedance in impedances tubes - Part 2: Transfer-function method (ISO 10534-2:1998)

Status: Withdrawn

· Replaced by: SS-EN ISO 10534-2:2024
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Standard Swedish standard · SS-EN ISO 10534-2

Acoustics - Determination of sound absorption coefficient and impedance in impedances tubes - Part 2: Transfer-function method (ISO 10534-2:1998)
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Scope
This test method covers 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 normal 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, porosity, elasticity and density, measurements described in this test method are useful in basic research and product development.
The test method is similar to the test method specified in ISO 10534-1 in that it uses an impedance tube with a sound source connected to one end and the test sample mounted in the tube at the other end. However, the measurement technique is different. In this test method, plane waves are generated in a tube by a noise source, and the decomposition of the interference field is achieved by the measurement of acoustic pressures at two fixed locations using wall-mounted microphones or an in-tube traversing microphone, and subsequent calculation of the complex acoustic transfer function, the normal incidence absorption and the impedance ratios of the acoustic material. The test method is intended to provide an alternative, and generally much faster, measurement technique than that of ISO 10534-1.

Subjects

General (17.140.01)


Buy this standard

Standard Swedish standard · SS-EN ISO 10534-2

Acoustics - Determination of sound absorption coefficient and impedance in impedances tubes - Part 2: Transfer-function method (ISO 10534-2:1998)
Subscribe on standards - Read more Dölj
Price: 1 152 SEK
standard ikon pdf

PDF

Price: 1 152 SEK
standard ikon

Paper

Price: 1 843,20 SEK
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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-31802

Edition: 1

Approved: 12/21/2001

No of pages: 31

Replaced by: SS-EN ISO 10534-2:2024