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一种新型电—热—声转换装置的特性研究 被引量：5

Study on Characteristics of a New Type of Electro-Thermo-Acoustic Transducer
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摘要 设计制作了一高频电—热—声转换装置,装置由电热层、绝缘层和导热层组成。将交变的电信号接入电热层,会产生交变的热信号,促使电热层表面附近的气体压力产生交变的振荡,形成相应的声波。装置产生了可测频率在3 kHz-25 kHz的热声现象。装置作为小型高频发声器具有频带宽、频响平坦、无运动部件等优点。 A new type of high frequency electro-thermo-acoustic transducer was designed and fabricated.This transducer consists of an electric heating surface layer,an insulation layer and a thermal conduction substrate.When an alternate voltage signal is input to the electric heating surface layer,a thermal signal will be generated.This thermal signal will cause the pressure of the air near the electric heating surface to oscillate,forming the acoustic wave correspondingly.This transducer can produce a high frequency thermo-acoustic effect in the measurable frequency range from 3kHz to 25kHz.It also has the advantage of the wide frequency bandwidth,flat frequency response and no moving parts.
作者 吴宵军 董卫 陈艳 魏娴
机构地区 东南大学能源与环境学院
出处 《噪声与振动控制》 CSCD 北大核心 2010年第3期160-163,共4页 Noise and Vibration Control
基金 科技部国际科技合作项目"太阳能收集器和蝶式热声发动机"
关键词 声学 电热声装置 实验 转换特性 acoustics electro-thermo-acoustic device experiment transfer characteristic
分类号 TB54 [理学—声学]
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参考文献14

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同被引文献42

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引证文献5

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噪声与振动控制
2010年 第3期

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