NDLI: A Reference Infrasound Source with Low Distortion Based on Laser Pistonphone Technology

Content Provider	Springer Nature Link
Author	He, Longbiao B. He, Wen Qin, Junhui H. Yang, Ping Zhong, Bo Niu, Feng
Copyright Year	2012
Abstract	For safety protection from infrasound and its metrology, a reference infrasound source was developed on the basis of the laser pistonphone technique. The electromagnetic vibrator was made based on the technology of air bearings and a displacement feedback system. The air bearings reduce the damping of the vibrator, and the displacement feedback system could effectively control the distortion of the pistonphone. Through the displacement of the piston measured by a laser interferometer, the sound pressure could be calculated. In the meantime, the sound pressure was measured by a LS1P microphone with the reciprocity calibration results. The test results show that the difference between the measured pressure and the calculated one is no more than 0.01 dB from 5 to 20 Hz and the total distortion of the sound pressure at 124.0 dB is less than 0.7 % from 1 to 20 Hz.
Starting Page	213
Ending Page	218
Page Count	6
File Format	PDF
ISSN	09703950
Journal	MAPAN
Volume Number	27
Issue Number	4
e-ISSN	09749853
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-12-13
Publisher Institution	Metrology Society of India
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Infrasound Reference source Laser pistonphone Distortion Measurement Science and Instrumentation Theoretical, Mathematical and Computational Physics Mathematical Methods in Physics Numerical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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