| Autor: |
Edge, Philip M., Mayes, William H. |
| Zdroj: |
Journal of the Acoustical Society of America; 1965, Vol. 37 Issue 6, p1189-1190, 2p |
| Abstrakt: |
In response to a need for research to determine possible effects of low-frequency noise associated with the launching of large spacecraft, the Langley Research Center has constructed an acoustic facility to operate in the frequency range from 1 to 50 cps. This facility makes use of a large, hydraulically driven speaker to generate sound-pressure levels of the order of 160 dB in a chamber of sufficient size to environmentally test full-scale manned spacecraft. This paper contains brief discussions of some research problems relating to low-frequency noise, the general design features of the facility, and some of the research capability available. The discussion of research capability includes brief descriptions of research under way. This research includes environmental tests of man and response and transmission tests both of flight-vehicle structures and of building structures. In addition to the capability for discrete frequency and random-noise testing, capability for testing with acoustic pressures of the impulse type having application to research relating to sonic boom is indicated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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