What is ISO 17497-1&2:2012?

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ISO 17497-1 specifies a method of measuring the directional coefficient of surfaces.
The degree of acoustic scattering from surfaces is very important in all aspects of room acoustics, e.g. in
concert halls, sound studios, industrial halls and reverberation chambers. The degree of scattering and
absorption in a room are important factors related to the acoustic quality of a room.
This part of ISO 17497 addresses the measurement and characterization of scattering surfaces.

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What is ISO-10534-2?

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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.

What is ASTM C423?

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ASTM C423 is the standard test method for sound absorption and sound absorption coefficients by the reverberation room method.

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Scope: This test method covers the measurement of the absorptive properties of a product in a reverberation room.

What is ISO 354?

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ISO 354:2003 specifies a method of measuring the sound absorption coefficient of acoustical materials used as wall or ceiling treatments, or the equivalent sound absorption area of object, such as furniture, persons or space absorbers, in a reverberation room.