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 …

Visualization is an effective way to understand the behavior of a sound field. There are
several methods for such observation including optical measurement technique which …

Visualizations help us to understand the sound field behavior. A well-known method of
sound field visualization is Kunt's experiment which visualizes standing waves using light …

Optical sound measurement, which acquires acoustical quantities by means of optical
techniques, is of growing interest as an alternative method for the sound field imaging. There …

2. Physical model of optically visualized sound field A sound field visualized by optical
measurement techniques can be considered as a two-dimensional sound field generated by …

In this study, we observe traveling sound waves with a laser and computed tomography. In
our previous research, we observed steady-state sound fields using a sine wave signal …

1. Introduction Microphones are widely used for detecting sound waves, where the sound
waves vibrate a diaphragm and then electrical signals in proportion to the degree of …

An effective way to understand the behavior of a sound field is to visualize it. An optical
measurement method is a suitable option for this as it enables contactless non-destructive …

We propose a method for the indirect measurement of the vibrating surface of an ultrasonic
transducer using a combination of the Michelson interference method, optical computerized …

Light propagating through a sound field is affected by variations in the density of the medium
caused by sound. Therefore, acoustical measurements using light have been studied. The …