Visualisation and measurement of acoustic and fluidic phenomena using a laser-scanning vibrometer

被引：4
|
作者：
Zipser, L [1 ]
Franke, H [1 ]
机构：
[1] Univ Appl Sci Dresden, HTW, D-01069 Dresden, Germany
来源：
FIFTH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER TECHNIQUES: ADVANCES AND APPLICATIONS | 2002年 / 4827卷
关键词：
visualisation of sound; visualisation of turbulences; ultrasound; vortexes;
D O I：
10.1117/12.468183
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A new method for non-interactively measuring and visualising turbulences, e.g. vortexes, and acoustic sound waves in gases is described. The measuring effect is based on the path difference Deltadelta between two interfering laser beams. This difference results from changes of the refractive index n, caused by pressure fluctuations p(t) in a measuring volume. The method is practicable in both the audio and the ultrasonic ranges, as well as for spatially small turbulences. It is adequate for the investigation and demonstration of numerous acoustic, fluidic and fluid-acoustic phenomena.
引用
收藏
页码：192 / 198
页数：7
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