Underwater sound visualization and temperature measurement using high-speed interferometer

Acoustical science and technology

article

Souta Yoshida¹  Risako Tanigawa²  Kohei Yatabe¹  Yasuhiro Oikawa¹ 

[1] Department of Intermedia Art and Science, Waseda University;Panasonic Corporation

关键词: Parallel phase-shifting interferometry;    Optical measurement;    High-speed camera;    Helmholtz equation;    Spatial spectrum;   

DOI  :  10.1250/ast.43.177

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

In this paper, we propose applying a high-speed polarization interferometer to underwater sound fields for their non-invasive visualization and temperature measurement. Underwater sound is usually measured by hydrophones that may disturb the sound field. To circumvent such disturbance, for airborne sound, a high-speed polarization interferometer has been proposed as a new measurement method. It enables non-contact measurement of non-stationary sound fields in air. This research applies the high-speed interferometer to underwater sound and confirms its capability of visualization. As an application, we also propose a non-invasive temperature measurement method that calculates temperature from the sound speed of visualized sound. As a result, we confirmed that the proposed method can measure the water temperature with an accuracy of about ±0.5 to 1.5°C.

【 授权许可】

Unknown