Optical Measurement of Sound Field by Laser Differential Interferometry

Koji Takahashi, Kunihito Nagayama

Research output: Contribution to journalArticle

Abstract

Laser differential interferometry using two laser beams of perpendicular polarization is applied to sound pressure measurements. The weak density difference due to the sound wave no more than 70dB between the two beams is measurable in proportional to the differential output signal of the two photo detecters. Both steady and transient sound wave signals are obtained by our interferometer as clearly as by microphone. Acoustic vibration of the optical systems and the way of sound visualization in future are also discussed.
Original languageEnglish
Pages (from-to)119-122
Journal可視化情報学会誌 = Journal of the Visualization Society of Japan
Volume16
Publication statusPublished - 1996

Fingerprint

differential interferometry
laser interferometry
sound fields
sound waves
optical measurement
pressure measurement
sound pressure
microphones
interferometers
laser beams
acoustics
output
polarization

Cite this

Optical Measurement of Sound Field by Laser Differential Interferometry. / Takahashi, Koji; Nagayama, Kunihito.

In: 可視化情報学会誌 = Journal of the Visualization Society of Japan, Vol. 16, 1996, p. 119-122.

Research output: Contribution to journalArticle

@article{044d4a275d944e5a8360adda3f3f5bff,
title = "Optical Measurement of Sound Field by Laser Differential Interferometry",
abstract = "Laser differential interferometry using two laser beams of perpendicular polarization is applied to sound pressure measurements. The weak density difference due to the sound wave no more than 70dB between the two beams is measurable in proportional to the differential output signal of the two photo detecters. Both steady and transient sound wave signals are obtained by our interferometer as clearly as by microphone. Acoustic vibration of the optical systems and the way of sound visualization in future are also discussed.",
author = "Koji Takahashi and Kunihito Nagayama",
year = "1996",
language = "English",
volume = "16",
pages = "119--122",
journal = "可視化情報学会誌 = Journal of the Visualization Society of Japan",
issn = "0916-4731",
publisher = "The Visualization Society of Japan",

}

TY - JOUR

T1 - Optical Measurement of Sound Field by Laser Differential Interferometry

AU - Takahashi, Koji

AU - Nagayama, Kunihito

PY - 1996

Y1 - 1996

N2 - Laser differential interferometry using two laser beams of perpendicular polarization is applied to sound pressure measurements. The weak density difference due to the sound wave no more than 70dB between the two beams is measurable in proportional to the differential output signal of the two photo detecters. Both steady and transient sound wave signals are obtained by our interferometer as clearly as by microphone. Acoustic vibration of the optical systems and the way of sound visualization in future are also discussed.

AB - Laser differential interferometry using two laser beams of perpendicular polarization is applied to sound pressure measurements. The weak density difference due to the sound wave no more than 70dB between the two beams is measurable in proportional to the differential output signal of the two photo detecters. Both steady and transient sound wave signals are obtained by our interferometer as clearly as by microphone. Acoustic vibration of the optical systems and the way of sound visualization in future are also discussed.

M3 - Article

VL - 16

SP - 119

EP - 122

JO - 可視化情報学会誌 = Journal of the Visualization Society of Japan

JF - 可視化情報学会誌 = Journal of the Visualization Society of Japan

SN - 0916-4731

ER -