SCATTERING OF LINEAR FM ACOUSTIC PULSES FROM ALUMINUM SPHERES IN WATER.
Abstract
Experimentally recorded farfield echoes from linear frequency modulated pulses incident on precision aluminum spheres in water are compared with computed echo forms. Good agreement was found using different pulse lengths and swept bandwidths. Spheres having ratios of internal to external radius of 0.95, 0.8, and 0.0 were studied, with either air or water in the hollow interior. Multiple periodic secondary echo components observed under some pulse conditions are interpreted in terms of circumferential waves and internal reflections. Crosscorrelations of incident pulses with corresponding echoes aid in the analysis of echo structure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 20, 1968
- Accession Number
- AD0682551
Entities
People
- E. E. Mikeska
Organizations
- University of Texas at Austin