不同结构石墨烯发声器的热声效率

辛济昊; 何星月; 王德波

doi:10.3788/OPE.20202804.0898

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不同结构石墨烯发声器的热声效率

微纳技术与精密机械 | 更新时间：2020-08-13

- 不同结构石墨烯发声器的热声效率
- Thermoacoustic efficiency of graphene sound-generators using different structures
- 光学精密工程 2020年28卷第4期页码：898-903
- 作者机构：
  
  南京邮电大学电子与光学工程学院、微电子学院，江苏南京 210023
- 作者简介：
  
  [ "辛济昊 (1996-)，男，江苏盐城人，硕士研究生，2017年于南京邮电大学获得学士学位，研究方向为声学MEMS器件。E-mail：1300238041@qq.com" ]
  王德波 (1983-)男，山东泰安人，副教授，硕士生导师，2012年于东南大学MEMS教育部重点实验室获得硕士和博士学位，目前在南京大学近代声学教育部重点实验室进行博士后工作，研究方向为MEMS微波功率传感器和声学MEMS器件。E-mail：wdb@njupt.edu.cn WANG De-bo, E-mail:wdb@njupt.edu.cn
- 基金信息：
  
  国家青年自然科学基金资助项目(61704086);中国博士后科学基金资助项目(2017M621692);江苏省博士后基金资助项目(1701131B);南京邮电大学国自基金孵化资助项目(NY215139);南京邮电大学国自基金孵化资助项目(NY217039);南京大学近代声学教育部重点实验室开放课题资助项目(1704);江苏省研究生科研与实践创新计划项目(KYCX18_0880);江苏省研究生科研与实践创新计划项目(SJKY19_0267)
- DOI：10.3788/OPE.20202804.0898
  中图分类号： TB552
- 收稿日期：2019-08-07，
  
  修回日期：2019-10-10，
  
  录用日期：2019-10-10，
  
  纸质出版日期：2020-04-15
- 稿件说明：
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辛济昊, 何星月, 王德波. 不同结构石墨烯发声器的热声效率[J]. 光学精密工程, 2020,28(4):898-903.

Ji-hao XIN, Xing-yue HE, De-bo WANG. Thermoacoustic efficiency of graphene sound-generators using different structures[J]. Optics and precision engineering, 2020, 28(4): 898-903.
辛济昊, 何星月, 王德波. 不同结构石墨烯发声器的热声效率[J]. 光学精密工程, 2020,28(4):898-903. DOI： 10.3788/OPE.20202804.0898.

Ji-hao XIN, Xing-yue HE, De-bo WANG. Thermoacoustic efficiency of graphene sound-generators using different structures[J]. Optics and precision engineering, 2020, 28(4): 898-903. DOI： 10.3788/OPE.20202804.0898.

摘要

为了研究不同石墨烯发声器结构对热声效率的影响，建立了石墨烯发声器的声压解析模型，对单层石墨烯发声器、多层石墨烯发声器以及镍铬基的泡沫石墨烯发声器的发声效率进行了理论与实验研究。首先，介绍了石墨烯发声器的工作原理，建立了石墨烯发声器的周期性温度变化模型和声压解析模型。然后，实验研究了单层石墨烯发声器、多层石墨烯发声器以及镍铬基的泡沫石墨烯发声器的热声效率。实验结果表明：在14~25 kHz内，施加6 V交流电，测距为6 cm的条件下，单层、多层和泡沫石墨烯发声器的最高SPL分别为35.19，20.36和33.42 dB，SPL理论值最高约为37.45 dB。具有较低电阻，较低比热容，较高导热率的石墨烯发声器可以获得较高的热声效率和声压。

Abstract

To study the influence of different graphene sound-generator structures on thermoacoustic efficiency

a sound pressure analytical model was established. Theoretical and experimental studies were conducted on the thermoacoustic efficiency of a monolayer graphene sound-generator

multilayer graphene sound-generator

and nickel/chromium-based graphene foam sound-generator. Firstly

the principle of a graphene sound-generator was introduced. A periodic temperature change model and a sound pressure analytical model of this generator were then established. Finally

the three aforementioned sound-generators were studied using an experimental method. The experimental results show that the maximum SPL values of the monolayer

multilayer

and the graphene foam sound-generator are 35.19

20.36 and 33.42 dB

respectively

in the frequency range of 14~25 kHz when 6 V AC is applied for a distance of 6 cm. The maximum theoretical SPL is approximately 37.45 dB. Graphene sound-generators with lower resistance

lower specific heat capacity

and higher thermal conductivity can achieve higher thermoacoustic efficiency and sound pressure.

关键词

Keywords

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