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

fYear

1991

fDate

14-17 Apr 1991

Firstpage

1457

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on

Conference_Location

Toronto, Ont.

ISSN

1520-6149

Print_ISBN

0-7803-0003-3

Type

conf

DOI

10.1109/ICASSP.1991.150716

Filename

150716