Accession Number : AD0756537

Title :   A Computer Technique for Near-Field Analysis of an Ultrasonic Transducer.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Griggs,Carlton Albert

Report Date : MAR 1973

Pagination or Media Count : 60

Abstract : A computer technique for obtaining near-field cross-section views of an ultrasonic field is presented. The technique is applied to ultrasonic transducer radiation patterns with sample contour drawings of several cross-sections. A spatial frequency spectrum formulation of diffraction theory is chosen for the computations which are performed with the aid of a fast Fourier transform routine. By experimentation an actual ultrasonic field was generated using a quartz transducer and the field was measured in a cross-sectional plane. A computer generated drawing of the measured data is compared to the drawing of a computer generated prediction of the field at the same plane. (Author)

Descriptors :   (*PIEZOELECTRIC TRANSDUCERS, ACOUSTIC PROPERTIES), (*ULTRASONIC RADIATION, DIFFRACTION), COMPUTER PROGRAMS, TEST METHODS, FOURIER ANALYSIS, INTEGRAL TRANSFORMS, TRANSFER FUNCTIONS, TEST EQUIPMENT, THESES

Subject Categories : Electrical and Electronic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE