Accession Number : AD0443713


Title :   STUDY OF FLUIDBORNE NOISE AND THE DEVELOPMENT OF FLUID ACOUSTIC FILTER TEST SPECIFICATIONS AND DESIGN RULES.


Corporate Author : CONESCO INC CAMBRIDGE MA


Report Date : May 1964


Pagination or Media Count : 1


Abstract : This report presents the results of a theoretical and experimental program to (1) investigate various ways to measure the acoustical properties of fluid acoustic filters, (2) develop a filter test specification for the determination of true attenuation of fluid acoustic filters and (3) develop design rules for the selection and location of filters in actual submarine piping systems. A complete presentation is given of the physical and mathematical behavior of noise in piping systems, and the theoretical concepts necessary for an understanding of the behavior of acoustic filters in piping systems and for their test evaluation is developed. Methods of measuring standing wave maxima and minima were investigated. Both moving and stationary hydrophone techniques were studied. A specification that describes the method, system, and procedures is presented. Design rules for the use of filters in actual submarine piping systems were prepared with the objective of presenting guidelines whereby acoustic filters can be designed and installed using the best available information. Possible solutions to the problem of low frequency attenuation when only a limited space is available are presented. (Author)


Descriptors :   *ACOUSTIC FILTERS , PERFORMANCE(ENGINEERING) , THEORY , SUBMARINES , PIPES , HYDROPHONES


Distribution Statement : APPROVED FOR PUBLIC RELEASE