|
|
|
| Two-dimensional Sound-field Scanning Based on Optical Method |
| WANG Hao-yu1,FENG Xiu-juan2,ZHU Hai-jiang1,HE Long-biao2,YANG Ping2,NIU Feng2,WANG Min2 |
1. Beijing University of Chemical Technology, Beijing 100029, China
2. National Institute of Metrology, Beijing 100029, China |
|
|
|
|
Abstract The sound field scanning scheme based on acousto-optic effect is investigated and demonstrated. By rotating and translating the loudspeaker, the laser vibrometer can measure the integral projection of the sound pressure along different positions and directions. Using the obtained projection information, the sound pressure distribution of the measured sound field can be reconstructed by inverse Radon transform algorithm. The optical method can improve the experimental efficiency and reduce the experimental time under the certain reconstructing resolution. The 2 kHz sound field emitted by the loudspeaker is reconstructed, and the result shows the two-dimensional spatial distribution of the sound pressure , the spatial and angular resolution are up to 5 mm , 10°.
|
|
Received: 28 November 2017
Published: 12 April 2018
|
|
|
|
|
|
［1］Buick J M, Cosgrove J A, Douissard P A, et al. Application of the acousto-optic effect to pressure measurements in ultrasound fields in water using a laser vibrometer［J］. Review of Scientific Instruments, 2004, 75(10): 3 203-3 207.
［2］Harland A R, Petzing J N, Tyrer J R. Nonperturbing measurements of spatially distributed underwater acoustic fields using a scanning laser Doppler vibrometer［J］. The Journal of the Acoustical Society of America, 2004, 115(1): 187-195.
［3］Theobald P D, Robinson S P, Hayman G, et al. Acousto-optic tomography for mapping of high-frequency sonar fields［J］. The Journal of the Acoustical Society of America, 2008, 123(5): 3 437-3 437.
［4］Fernandez-Grande E, Torras-Rosell A. Three-dimensional reconstruction of sound fields based on the acousto-optic effect［J］. The Journal of the Acoustical Society of America, Acoustical Society of America, 2013, 134(5): 3 998-3 998.
［5］Torras-Rosell A, Barrera-Figueroa S, Jacobsen F. Sound field reconstruction using acousto-optic tomography［J］. The Journal of the Acoustical Society of America, 2012, 131(5): 3 786-3 793.
［6］Rosell A T, Figueroa S B, Jacobsen F. An investigation of sound fields based on the acousto-optic effect［C］// International Congress on Sound and Vibration 2011 (ICSV18) 18th. 18th International Congress on Sound and Vibration 2011. Rio de Janeiro, Brazil, 2011. |
|
|
|
2018, Vol. 39 
