Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow
Joint Authors
Sonoda, Yoshito
Nakazono, Yoichi
Source
Advances in Acoustics and Vibration
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-14
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
The optophone with no diaphragm, which can detect sound waves without disturbing flow of air and sound field, is presented as a novel sound measurement technique and the present status of development is reviewed in this paper.
The method is principally based on the Fourier optics and the sound signal is obtained by detecting ultrasmall diffraction light generated from phase modulation by sounds.
The principle and theory, which have been originally developed as a plasma diagnostic technique to measure electron density fluctuations in the nuclear fusion research, are briefly introduced.
Based on the theoretical analysis, property and merits as a wave-optical sound detection are presented, and the fundamental experiments and results obtained so far are reviewed.
It is shown that sounds from about 100 Hz to 100 kHz can be simultaneously detected by a visible laser beam, and the method is very useful to sound measurement in aeroacoustics.
Finally, present main problems of the optophone for practical uses in sound and/or noise measurements and the image of technology expected in the future are shortly shown.
American Psychological Association (APA)
Sonoda, Yoshito& Nakazono, Yoichi. 2012. Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow. Advances in Acoustics and Vibration،Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-507317
Modern Language Association (MLA)
Sonoda, Yoshito& Nakazono, Yoichi. Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow. Advances in Acoustics and Vibration No. 2012 (2012), pp.1-17.
https://search.emarefa.net/detail/BIM-507317
American Medical Association (AMA)
Sonoda, Yoshito& Nakazono, Yoichi. Development of Optophone with No Diaphragm and Application to Sound Measurement in Jet Flow. Advances in Acoustics and Vibration. 2012. Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-507317
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-507317