Accession Number : AD0694079
Title : A METHOD FOR THE PREDICTION OF THE FARFIELD FROM NEARFIELD AMPLITUDE MEASUREMENTS OF A COHERENT SOUND FIELD.
Descriptive Note : Scientific rept.,
Corporate Author : PARKE MATHEMATICAL LABS INC CARLISLE MASS
Personal Author(s) : Butler,John L.
Report Date : OCT 1969
Pagination or Media Count : 15
Abstract : A method is presented for the prediction of the farfield from nearfield measurements of the amplitude alone of a coherent field. The method is based on a finite series wavefunction expansion for the pressure amplitude in the field. It is shown that with the expansion specialized for a coherent field there is a vast improvement over a previous general method for partially coherent fields. (Author)
Descriptors : (*SOUND, INTENSITY), COHERENT RADIATION, MATHEMATICAL PREDICTION, SOUND TRANSMISSION, PHASE
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE