Study of Carbon-Nanotube Web Thermoacoustic Loud Speakers

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概要

• 論文の詳細を見る

• 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.

• 2011-01-25

著者

• Okada Morihiro

  Research Institute Of Electronics Shizuoka University

• Mimura Hidenori

  Research Institute Of Electrical Commnication Tohoku University

• Inoue Yoku

  Department Of Electrical And Electronic Engineering Faculty Of Engineering Shizuoka University

• Neo Yoichiro

  Reseach Institute Of Electrical Communication Tohoku University

• Suzuki Katsunori

  Graduate School of Science and Technology, Shizuoka University, Hamamatsu 432-8011, Japan

• Inoue Yoku

  Department of Electrical and Electronic Engineering, Shizuoka University, Hamamatsu 432-8011, Japan

• Sakakibara Shingo

  Research Institute of Electronics, Shizuoka University, Hamamatsu 432-8011, Japan

• Murata Toshihiro

  Yamaha Corporation, Hamamatsu 430-8650, Japan

• Mimura Hidenori

  Reseach Institute of Electrical Communication, Tohoku University,

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