Study of Carbon-Nanotube Web Thermoacoustic Loud Speakers

• Katsunori Suzuki

• Shingo Sakakibara

• Morihiro Okada

• Yoichiro Neo

• Hidenori Mimura

• Yoku Inoue

• Toshihiro Murata

抄録

Thermoacoustic carbon nanotube (CNT) speakers were fabricated using CNT webs spun from a multiwalled carbon nanotube (MWNT) array of 0.8–1.6 mm height. The generated sound pressure level (SPL) showed a linear relationship with frequency over a wide range from 10 Hz to 40 kHz with a slope of 6 dB/octave. In addition to this, significantly broad and flat SPLs were obtained in the ultrasonic region, ranging from 40 to 100 kHz. The distance from the speaker to the microphone was 0.5 m. The high SPL is due to the good heat radiation property of the MWNT web. Herein, we showed an acoustical property for the MWNT web thermoacoustic speaker from the viewpoint of the structural web morphology. The role of heat radiation behavior and the effects of the length of individual MWNTs are discussed.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 50 (1S2), 01BJ10-, 2011-01-01

  IOP Publishing

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1360847871786129152
• NII論文ID: 210000069984
• DOI: 10.1143/jjap.50.01bj10
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.01BJ10
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.50.01BJ10/pdf
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