Accession Number : AD0700598

Title :   A DEVICE FOR MUFFLING THE LF NOISE COMPONENTS OF AERODYNAMIC OR GAS DYNAMIC INSTALLATIONS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Munin,A. G. ; Chikin,K. G. ; Yudin,E. Ya.

Report Date : 11 SEP 1969

Pagination or Media Count : 6

Abstract : A device is described for muffling the LF noise components of aerodynamic and gas dynamic installations. In order to reduce its dimensions and cost, its sound-absorbing section is made in the form of a single column whose diameter is approximately equal to the wavelength of the noise component having the lowest frequency and which consists in a layer of sound-absorbing granular material protected from the thermal and mechanical action of the gas by a layer of large stones and a perforated metal jacket. (Author)

Descriptors :   (*AERODYNAMIC NOISE, ATTENUATION), LOW FREQUENCY, AERODYNAMIC CHARACTERISTICS, ACOUSTIC INSULATION, PATENTS, USSR

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE