摘要
碳纳米管薄膜是一种由碳原子组成的新型纳米材料,可被制作成一种基于热致发声效应的扬声器。针对碳纳米管薄膜电-热-声系统的频率失真问题,提出添加钳位电路的解决方法,并进行了理论研究和实验验证。结果表明,加入钳位电路后,系统输出的声波频率与输入电压频率变为一致,且声能量显著增大,声压级提高约5 d B。与传统叠加直流偏置电压的方法相比,无需直流电源,降低了系统功耗。
Carbon nanotube film is a kind of new nanomaterials composed of carbon atoms and can be made into a new kind of loudspeaker based on the thermophone theory. The method to add a clamp circuit is offered to solve the frequency distortion optimization problem in the carbon nanotube thin film loudspeaker system. This solution has been theoretically and experimentally investigated in this paper. Results indicate that the output acoustic frequency is equal to the input voltage frequency after adding the clamp circuit. Besides, the acoustic energy increases significantly and the sound pressure level （SPL） improves about 5 dB. Compared with the traditional way to add the direct current bias, the solution in this paper dispenses with the direct-current power supply and reduces system power consumption.
出处
《电子技术应用》
北大核心
2015年第12期54-57,共4页
Application of Electronic Technique
基金
国家自然科学基金面上项目(51375321)
机械设备健康维护湖南省重点实验室开放基金(201402)
关键词
碳纳米管薄膜
钳位电路
频率失真
直流偏置电压
carbon nanotube film
clamp circuit
frequency distortion
direct current bias
