The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Analytical and Experimental Investigation of the Acoustic Environment of the RTD Sonic Fatigue Main Test Chamber

Report Number: FDL TDR 64-26
Author: Tyzzer, Franklin G.
Author: Pernet, David F.
Corporate Author: IIT Research Institute
Laboratory: AF Flight Dynamics Laboratory
Date of Publication: 1964-04
Pages: 114
Contract: AF 33(657)-10927
Project: 4437
Task: 443701
AD Number: AD0601611

The extreme versatility of the RTD Sonic Fatigue Facility creates problems in analysis and control of attainable environments. Acoustic environments have been analyzed using both theoretical and experimental modelling techniques, with regard to spatial distribution and correlation of sound pressures. A diffuse field study has enabled predictions of sound fields to be made for many cases of source and test structure parameters. Progressive-wave operation of the facility for small groups of sources was analyzed and some typical pressure field distributions were evaluated. The modifying effect on the progressive wave pressure fields, caused by locating test structures in these fields, was studied with respect to the size, location, and orientation of test-structures, the operational frequency of the source system and the relationship between the individual sources forming the overall system. Conditions were established for obtaining uniform, gradual, or rapid variations, and alternate maxima and minima in sound pressure level on the exposed surfaces of structures.

Lockheed Martin Missiles & Fire Control
Download this report

(PDF, 2.71 MB, 114 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale