시험방법에 따른 흡음률 비교

다국어 초록 (Multilingual Abstract)

Today, the use of the sound absorptive material is increasing to improve the room acoustics in the auditorium and music hall, etc. Usually, the sound absorption materials have been used to enhance the performance of a noise barrier and improve the room acoustics in construction site. Generally, the sound absorbtion coefficients are the most important factor reflecting the sound absorbtion performance. There are two methods to measure the sound absorption coefficient. The first one is the reverberation room method, and the second is the impedance tube method. In this study, we measure the sound absorbtion coefficients using these two methods, and then we compared the results of the sound absorbtion coefficients to look into the difference of results between reverberation room method and impedance tube method. Also we compared the results of the sound absorbtion coefficients with respect to the size of sample and the volume of reverberation room. From the experiment, we could see that the sound absorbtion coefficients are measured equally for different sample size. But the sound absorbtion coefficients are measured differently according to test methods and test conditions.

참고문헌 (Reference)

1 강대준, "흡음재의 시험조건에 따른 흡음성능 특성" 한국소음진동공학회 16 (16): 683-689, 2006

2 "KS F 2814-2, 2002, Acoustics-Determination of Sound Absorption Coefficient and Impedance in Impedance Tubes-Part2 : Transfer-function Method"

3 "KS F 2805, 2004, Measurement of Sound Absorption in a Reverberation Room"

4 前川純一, "Architectural Acoustics(建築音響)" 共立出版株式會社 1984

5 "ASTM C 423, 2002, Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method"