Direct detection of sound wave by light

Author

Sonoda, Y. ; Nakamiya, T.

Author_Institution

Grad. Sch. of Sci. & Technol., Tokai Univ., Kumamoto, Japan

fYear

2014

fDate

7-10 Oct. 2014

Firstpage

76

Lastpage

80

Abstract

Optical wave microphone is a novel method to measure audio and ultrasonic sounds by a laser beam with no diaphragm. In this method, ultra-weak diffraction light generated by sound is optically Fourier transformed and converted into an electrical signal. In this study, in order to improve the S/N ratio for practical use, the external resonator structure of He-Ne laser is used as a sound sensor and the sound signal amplification property is theoretically and experimentally examined. We succeeded in sound signal amplification by this method.

Keywords

audio signal processing; microphones; resonators; signal detection; He-Se; audio sounds; direct sound wave detection; external resonator structure; laser beam; optical wave microphone; optically Fourier transform; sound sensor; sound signal amplification property; ultra-weak diffraction light; ultrasonic sounds; Laser beams; Measurement by laser beam; Microphones; Optical diffraction; Optical reflection; Optical resonators; Optical variables measurement; Audiosound; Laser; Optical microphone; Ultrasound;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (GCCE), 2014 IEEE 3rd Global Conference on

Conference_Location

Tokyo

Type

conf

DOI

10.1109/GCCE.2014.7031109

Filename

7031109