Second harmonic distortion suppression of thermoacoustic transducer using square root circuit

Acoustical Science and Technology

Takehiro Sugimoto¹  Yoshiki Nakajima¹ 

[1] Science & Technology Research Laboratories, NHK

关键词: Thermoacoustic effect;    Transducer;    Harmonic distortion;    Modeling;   

DOI  :  10.1250/ast.37.99

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

References(16)Suppression of the second harmonic distortion intrinsic to a thermoacoustic transducer was studied using a square root circuit. The thermoacoustic transducer used in this study is composed of aluminum film, polyimide, and graphite film in order for it to be thin and bendable. A theoretical model was developed to calculate the radiated sound pressure on the basis of a fundamental equation for the heat transfer between the transducer and surrounding air. A square root circuit was designed to enable real-time signal processing and the effectiveness of the circuit regarding the second harmonic distortion suppression was experimentally confirmed.

【 授权许可】

Unknown