Title :
Direct detection of sound wave by light
Author :
Sonoda, Y. ; Nakamiya, T.
Author_Institution :
Grad. Sch. of Sci. & Technol., Tokai Univ., Kumamoto, Japan
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;
Conference_Titel :
Consumer Electronics (GCCE), 2014 IEEE 3rd Global Conference on
Conference_Location :
Tokyo
DOI :
10.1109/GCCE.2014.7031109
