Efficient angular spectrum decomposition of acoustic sources. II. Results

Author

Orofino, Donald P. ; Pedersen, Peder C.

Author_Institution

Dept. of Electr. & Comput. Eng., Worcester Polytech. Inst., MA, USA

Volume

40

Issue

3

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

250

Lastpage

257

Abstract

For pt.I see ibid., vol.40, no.3, p.238-49 (1993). Results of angular spectrum computations are presented for three applications: general decomposition, pressure field calculation, and modeling of pulse-echo measurements. Wherever possible, analytical (exact) results are used as reference for the decomposition results. This permits the accuracy of the angular spectrum decomposition to be evaluated for specific choices of M and N where M is the number of samples across the maximum characteristic length, d, of the source region and N is the total number of samples along each side of the source decomposition plane, and for both sampling techniques. Based on the results for the three applications, guidelines for choosing M and N are presented in a graphical format.<>

Keywords

acoustic field; acoustic radiators; acoustic signal processing; echo; fast Fourier transforms; spectral analysis; 2D FFT; acoustic sources; angle dependent spectral distortion; angular spectrum decomposition; pressure field calculation; pulse-echo measurements; sampling techniques; source decomposition plane; Acoustic transducers; Acoustic waves; Computational efficiency; Guidelines; Pistons; Pulse measurements; Sampling methods; Shape; Spatial resolution; Two dimensional displays;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.216838

Filename

216838