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Acoustics and Microgravity Flight
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English
Abstract
The effects of acoustic levels in manned space vehicles was not thoroughly appreciated until the STS 40 mission, Spacelab Life Sciences 1 (June, 1991). Previous to that mission, waivers were submitted and equipment operated without overwhelming effect on ongoing flight activities. The factors of multiple pieces of noise producing equipment operating simultaneously, operating in the vicinity of crew sleep stations, and operating for this long of a mission (10 days) became relevant in crew tolerance, fatigue, communication, and permanent shifts in hearing thresholds. Because this was a life sciences mission, accurate instrument measurements were obtained of acoustic levels in the middeck, flight deck and spacelab during flight and physiological measurements were obtained from the crew members during all phases of the mission. Due to the STS 40 results, a Spacelab/Payloads Acoustics Working Group (SPAWG) was formed post flight to address acceptable acoustic limits. The charter of this group was to: Identify and assess orbiter, spacelab, subsystems, and experiment hardware with the objective of reducing the overall acoustic levels on the Middeck and within the Spacelab module to acceptable flight levels. Members of the group represented NASA headquarters, field centers, and payload developers.
This paper will briefly address the acoustic impact on crew persons during STS 40, the recommendations of the SPAWG, and current means of addressing acoustic issues within life sciences hardware flown on microgravity missions.
Topic
Citation
Dalton, B. and Hines, M., "Acoustics and Microgravity Flight," SAE Technical Paper 951644, 1995, https://doi.org/10.4271/951644.Also In
References
- Beranek, Leo L. 1957 Revised Criteria for Noise Control in Buildings Noise Control 3 19 27
- NASA 1986 Orbiter vehicle end item specification (OVEI) (MJ070-0001-1c) Houston, TX National Aeronautics and Space Administration Orbiter Vehicle End Item Specification (OVEI)
- NASA 1985 Spacelab Payloads Accommodations Handbook (SLP 2104) Houston, TX NASA
- Spacelab Management--JA21 Marshall Space Flight Center Huntsville, AL January 1994
- NASA 1991 Document B: Objective and Subjective Measures of Noise on STS-40/SLS-1 Man Systems Division Johnson Space Center Houston, TX
- Morgan G. SLS-1 Interface Revision Notice (IRN) Feb. 5 1991 Johnson Space Center
- NASA 1991 Document B: Objective and Subjective Measures of Noise on STS-40/SLS-1 13 Man Systems Division Johnson Space Center Houston, TX
- NASA 1989 Man Systems Integration Standards 1 NASA-STD-3000 5 44 Johnson Space Center Houston, TX
- NASA 1989 Man Systems Integration Standards 1 NASA-STD-3000 5 44 Johnson Space Center Houston, TX
- Thurmann, P. E. Miller, Richard K. 1986 Fundamentals of Noise Control Engineering New Jersey Prentice-Hall
- DSO
- Ward, W. D. 1962 Damage-risk Criteria for Line Spectra Journal of the Acoustical Society of America 34 1610 1619
- NASA July 1992 Spacelab/Payloads Acoustics Working Group (SPAWG) Final Report NASA Headquarters Office of Space Science and Applications Washington, D. C.
- Warnix, J. L August 13 1994 Data Pack: Acoustic Noise Measure of the Ames Research Center Animal Enclosure Module S/N 001-004 & 101-104,” Lockheed Engineering and Sciences Company Engineering Group, NASA Johnson Space Center Houston, TX