The Sound Field of a Moving Laser-Induced Acoustic Array (Theory).
Abstract
This report describes the theoretical investigation of the sound field radiated by a moving laser source. When an intensity modulated laser beam illuminates a column of water, it produces a highly directive thermoacoustic array (or optoacoustic antenna). This report discusses a time domain approach for predicting the pressure field radiated by a moving (subsonic, transonic, or supersonic) thermoacoustic array. The theory is based on a convolution type summation between the impulse response of the thermoacoustic array and the laser pulse intensity. The theoretical model is for both nearfield and farfield radiation and for any Mach number of the source. Keywords include: Thermoacoustic array; Optoacoustic antenna; Impulse response; Step response; Convolution; and Exponential shading.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 04, 1984
- Accession Number
- ADA154553
Entities
People
- I. J. Busch-vishniac
- Y. H. Berthelot
Organizations
- University of Texas at Austin