NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Optical Measurement Of Sound PressureNoninvasive technique does not disturb field it measures. Sound field deflects laser beam proportionally to its amplitude. Knife edge intercepts undeflected beam, allowing only deflected beam to reach photodetector. Apparatus calibrated by comparing output of photodetector with that of microphone. Optical technique valuable where necessary to measure in remote, inaccessible, or hostile environment or to avoid perturbation of measured region.
Document ID
19890000440
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Trinh, Eugene H.
(Caltech)
Gaspar, Mark
(Caltech)
Leung, Emily W.
(Caltech)
Date Acquired
August 14, 2013
Publication Date
September 1, 1989
Publication Information
Publication: NASA Tech Briefs
Volume: 13
Issue: 9
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-17565
Accession Number
89B10440
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available