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An evaluation of Space Shuttle STS-2 payload bay acoustic data and comparison with predictions

Author:
Piersol, A. G.
Published:
Jul 1, 1982.
Physical Description:
1 electronic document
Additional Creators:
Wilby, J. F. and Wilby, E. G.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary:
Space average sound pressure levels computed from measurements at 18 locations in the payload bay of the Space Shuttle orbiter vehicle during the STS-2 launch were compared with predicted levels obtained using the PACES computer program. The comparisons were performed over the frequency range 12.5 Hz to 1000 Hz, since the test data at higher frequencies are contaminated by instrumentation background noise. In general the PACES computer program tends to overpredict the space average sound levels in the payload bay, although the magnitude of the discrepancy is usually small. Furthermore the discrepancy depends to some extent on the manner in which the payload is modeled analytically, and the method used to determine the "measured' space average sound pressure levels. Thus the difference between predicted and measured sound levels, averaged over the 20 one third octave bands from 12.5 Hz to 1000 Hz, varies from 1 dB to 3.5 dB.
Other Subject(s):
Collection:
NASA Technical Reports Server (NTRS) Collection.
Note:
Document ID: 19830004877.
Accession ID: 83N13148.
NAS 1.26:170451.
NASA-CR-170451.
BBN-4748.
Terms of Use and Reproduction:
No Copyright.
View MARC record | catkey: 15714252