Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2002.11a
- /
- Pages.370.1-370
- /
- 2002
- /
- 1598-2548(pISSN)
Measurement of absorption coefficient using beamforming method
빔형성방법을 이용한 흡음계수 측정법
- Ju, Hyung-Jun (Seoul National University) ;
- Kang, Yeon-June (Seoul National University)
- Published : 2002.11.01
Abstract
A method using beamforming has been developed to measure absorption coefncient of oblique incidence. MUSIC(Multiple Signal Classification) method detects the angle of incidence and reflection. And beamforming method separates the incident and reflected wave. And spatial smoothing technique is used to reduce the coherence between the incident and reflected wave. The test material were modeled as a locally reacting surface. Numerical and experiment results are performed to verify the performance of proposed method.