JIS A 1405-2:2007
Acoustics -- Determination of sound absorption coefficient and impedance in impedance tubes -- Part 2: Transfer-function method
- Standard No.
- JIS A 1405-2:2007
- Release Date
- 2007
- Published By
- Japanese Industrial Standards Committee (JISC)
- Latest
- JIS A 1405-2:2007
- Replace
- JIS A 1405:1998
- Scope
- This standard specifies the use of an acoustic tube, two microphone positions, and a digital frequency analysis system necessary to measure the normal incidence sound absorption coefficient of sound-absorbing materials. This standard is also applicable to the measurement of the specific acoustic impedance or specific acoustic admittance of the surface of sound absorbing materials. Since the specific acoustic impedance of a sound-absorbing material is related to its physical properties (e.g. flow resistance, void modulus, elasticity and bulk density), measurements according to this standard are suitable for basic research and product development.
JIS A 1405-2:2007 history
- 2007 JIS A 1405-1:2007 Acoustics -- Determination of sound absorption coefficient and impedance in impedance tubes -- Part 1: Method using standing wave ratio
- 1998 JIS A 1405:1998 Acoustics -- Determination of sound absorption coefficient and impedance in impedance tubes -- Method using standing wave ratio
- 1994 JIS A 1405:1994 Methods of test for sound absorption of acoustical materials by the tube method
