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http://dx.doi.org/10.5050/KSNVN.2008.18.6.612

Study on Shear Layer Correction of Microphone Array Measurement in the Wind Tunnel Test  

Kim, Wi-Jun (충남대학교 항공우주공학과)
Rhee, Wook (충남대학교 항공우주공학과)
Choi, Jong-Soo (충남대학교 항공우주공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.18, no.6, 2008 , pp. 612-618 More about this Journal
Abstract
Microphone array beamforming method has been recognized as an important aeroacoustic research field and become a standard technique in localizing sound sources. This method also used in flight acoustic measurement, and especially, it is very useful when measure sounds inside the wind tunnel. In measuring sound which is inside the wind tunnel by traditional beamforming method, there are some errors caused by airstream. The speed and the propagation path of the sound changes as it travel through the airstream. This makes the error which the position of sound is changed a little bit to the down stream direction. In this paper, validation test has made about the correction equation for this wind effects of previous researches. And beamforming including shear layer correction was performed about a sound source in the anechoic open-jet wind tunnel.
Keywords
Shear Layer Correction; Source Localization; Microphone Array; Beamforming; Wind Tunnel Test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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