A Comparison of Acoustic Field Measurement by a Microphone and by an Optical Interferometric Probe

R. Bálek, Z. Šlegrová


The objective of this work is to show that our optical method for measuring acoustic pressure is in some way superior to measurement using a microphone. Measurement of the integral acoustic pressure in the air by a laser interferometric probe is compared with measurement using a microphone. We determined the particular harmonic components in the acoustic field in the case of relatively high acoustic power in the ultrasonic frequency range.


acousto-optics; ultrasonic light diffraction; heterodyne laser interferometer

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ISSN 1210-2709 (Print)
ISSN 1805-2363 (Online)
Published by the Czech Technical University in Prague