이동 프레임 음향 홀로그라피 방법을 이용한 이동 음원의 방사 음장 가시화

Abstract

This paper introduces moving frame acoustic holography (MFA H) method. The method was originally proposed to increase the aperture size and the spatial resolution of hologram by using a moving line array of microphones. The hologram of the scanned plane can be obtained by the relative coordinate transformation. The main advantage of this method is that it enables us to visualize the noise generated by moving noise sources by employing a vertical line array of microphones affixed to the ground. This paper demonstrates the practical applicability of MFAH for the visualization of moving noise sources and discusses the limitation of the method.