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재료 시험 규격잔향 실 법 흡음 금액
- ISO 354: 1985, Acoustics - Measurement of sound absorption in a reverberation room. Amendment (1998)
- ASTM C 423-99a: Standard Test Method for Sound Absorption ans Sound Absorption Coefficients by the Reverberation Room Method
음향 임피던스 튜브 보는 방법
- ISO 10534-1: 1996, Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes - Part 1: Method using standing wave ratio
- ASTM C 384-98: Standard Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
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