High frequency response of carbon nanotube thin film speaker in gases
High frequency response of carbon nanotube thin film speaker in gases
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DOI：
10.1063/1.3651374
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发表时间：
2011-10-15
影响因子：
3.2
通讯作者：
Jiang, Kaili
中科院分区：
文献类型：
--
作者：
Xiao, Lin;Liu, Peng;Jiang, Kaili
研究了碳纳米管（CNT）薄膜在300 Hz ~ 100 kHz频率范围内的热声响应。理论推导表明，在人耳可听频率范围内，碳纳米管薄膜产生的声压与气体热容的倒数近似成正比，这与在氩气、空气和氦气中的实验结果一致。对于大尺寸的碳纳米管薄膜，在空气中，在较高的频率范围内观察到声压的降低，这是由于根据理论计算的近场区的声波的相消干涉。(C)2011年美国物理学会。[doi：10.1063/1.3651374]
The thermoacoustic response of carbon nanotube (CNT) thin films at frequencies ranging from 300 Hz up to 100 kHz has been studied in a variety of gaseous mediums. Theoretical derivations show that the sound pressure generated by CNT thin films is approximately proportional to the inverse of the heat capacity of the gas within the audible frequency range of human hearing, which is consistent with the experimental results in argon, air, and helium. For large size CNT films, a decrease in sound pressure is observed within a higher frequency range in air, which is attributed to the destructive interference of sound waves in the near field zone according to the theoretical calculations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3651374]