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Please use this identifier to cite or link to this item: http://hdl.handle.net/11133/1527

Title: レーザマイクロフォンによる音波検出に関する研究
Other Titles: レーザ マイクロフォン ニヨル オンパ ケンシュツ ニ カンスル ケンキュウ
Study on detection of sound wave by laser microphone
Authors: 神田, 明典
津田, 紀生
山田, 諄
KANDA, Akinori
TSUDA, Norio
Issue Date: 31-Mar-2012
Publisher: 愛知工業大学
Abstract: Since the vibrating film is used for a current microphone, the detectable frequency is restricted.Recently, the influence on the human body by the sound wave of low frequency or high frequency from various apparatuses or equipmentshas became a problem. It is necessary to detect the sound wave of such frequency.A new type of microphone by using self-coupling effect of semiconductor laser has been studied.It is named the laser microphone.This microphone consists of laser and a light reflector, and it is not necessary to post-process a signal. An acoustic field is not disturbed by the microphone. The laser microphone can detect a sound withfrequency from 10Hz to 20kHz. The laser microphone is more sensitive than the condenser microphone in long distance from sound source, and is detectable a sound with lower frequency than condenser microphone. Moreover, if there is the sound source with some sound pressure, sound with the lower frequency below 10 Hz may be detectable.
URI: http://hdl.handle.net/11133/1527
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