Application of Acoustic Holography to Automobile Aeroacoustic Noise of Low Coherence

낮은 상관 관계를 갖는 자동차 공력 소음에 대한 음향 홀로그래피

Acoustic holography is applied to automobile aeroacoustic noise. Automobile aeroacoustic noise has low coherence due to multiple independent sources and measurement noise. This paper discusses the reliability of acoustic holography on this low coherence condition. Main subjects are the number and position of reference microphones, which is used for a step-by-step scanning method, and measurement noise. A real automobile experiment verifies the results.