Title :
Wide-band analysis of reflections from rough surfaces
Author :
Bozma, Ömür ; Kuc, Roman
Author_Institution :
Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA
Abstract :
The reflection of wideband pulse signals from rough surfaces is analyzed. A Kirchoff approximation method is employed to describe scattering from rough surfaces, where the usual plane-wave assumption is relaxed to include spherically diverging waves. The signal intensity detected at a point is expressed as an inverse Fourier transform of the product of the frequency correlation function of the channel and the transmitted pulse power spectrum. Coherent and incoherent components of the received signal are determined. The theory is compared with experimental results obtained from the two rough surfaces using the Polaroid transducer operating in air. Good agreement is obtained over the range of angles of incidence from 0° to 60°
Keywords :
acoustic transducers; acoustic variables measurement; acoustic wave reflection; acoustic wave scattering; approximation theory; Kirchoff approximation method; Polaroid transducer; acoustic transducer; acoustic waves; air; angles of incidence; coherent components; frequency correlation function; incoherent components; inverse Fourier transform; product; pulse power spectrum; received signal; reflections; rough surfaces; scattering; signal intensity; spherically diverging waves; wideband pulse signals; Approximation methods; Fourier transforms; Reflection; Rough surfaces; Scattering; Signal analysis; Signal detection; Surface roughness; Surface waves; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150716
