소노루미네센스 현상을 이용한 음향 가시화법의 개선에 관한 연구

Abstract

In spite of many studies in acoustic field visualization by sonoluminescence, the visualization method has not been used widely because it needs high acoustic intensity to get the luminescence intensity enough to observe. To overcome this problem, a background acoustic field is introduced for observing comparatively weak acoustic fields. The background acoustic field from the other transducer generates constructive interference with the acoustic field from the test transducer. Another improvement method of the digital image processing was used in this study. Recently, it becomes possible to obtain the digital data of sonoluminescence image due to high resolution in modernized digital cameras. Using a simple digital image processing for the sonoluminescence image, the enhancement method of acoustic visualization was successfully demonstrated.