Journal
OSA CONTINUUM
Volume 1, Issue 1, Pages 200-212Publisher
OPTICAL SOC AMER
DOI: 10.1364/OSAC.1.000200
Keywords
-
Categories
Funding
- Hoso Bunka Foundation
- JSPS [17F17369]
- Science and Engineering Research Board (SERB), Government of India [SB/OS/PDF-117/2015-16]
- Grants-in-Aid for Scientific Research [17F17369] Funding Source: KAKEN
Ask authors/readers for more resources
We present the characteristics of indirect frequency measurement system based on off-axis digital holography (DH) for vibrating objects. which works on phase change characteristics of a medium where sound wave propagates. The sound field measurement method using off-axis DH already proposed by the author's group is applied to the measurement of vibration frequency of arbitrary sound sources. In DH based sound imaging for frequency measurement. object wave passes near to vibrating object and the interference patterns are recorded in digital holograms as a function of time. After using inverse Fresnel calculation, acousto-optic data processing, and Fourier analysis, vibration frequency of an object of interest can bc measured. In this paper, the measurement capability of vibration frequency for different objects and quantitative characteristics of the sound power are evaluated experimentally. The frequency range of the experimental results am from hundreds Hz to tens of kHz that covers audible range. The comparison with microphone recording and the analysis have also been carried out to check the strength and stability of the proposed scheme. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available