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Acoustic Test Facility Capabilities at Gulfstream Aerospace
Technical Paper
2011-01-1647
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Gulfstream Aerospace Corporation (GAC) owns and operates an Acoustic Test Facility (ATF) in Savannah, GA. The ATF consists of a Reverberation Chamber, Hemi-Anechoic Chamber, and a Control Room. Types of testing conducted in the ATF include Transmission Loss, Sound Power, and Vibration testing. In addition to accommodating typical types of acoustic testing, the ATF has some unique capabilities. The ATF can be used to conduct testing at cold temperatures representative of up to 45,000 ft flight altitude, while simultaneously taking Transmission Loss measurements of the chilled test sample. Additionally, the ATF has the capability of conducting Transmission Loss testing of a full mockup of the aircraft sidewall, including a section of fuselage, all the thermal/acoustic materials up to and including the interior decorative panel. A sound source capable of very high amplitudes at high frequencies is required to obtain good measurements from testing multiple wall systems such as this. The ATF uses a sound source that can produce 140dB SPL at frequencies above 1000Hz. Another challenge for measuring high Transmission Loss systems is flanking. Extreme care must be taken to ensure that the surrounding structure produces significantly more Transmission Loss than the test sample. The ATF utilizes a combination of a high amplitude noise source, an effective barrier, and good sealing techniques to ensure that GAC can measure Transmission Loss in excess of 120dB.
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Citation
Lynch, K. and Maxon, J., "Acoustic Test Facility Capabilities at Gulfstream Aerospace," SAE Technical Paper 2011-01-1647, 2011, https://doi.org/10.4271/2011-01-1647.Also In
References
- SAE International Surface Vehicle Recommended Practice “Laboratory Measurement of the Airborne Sound Barrier Performance of Automotive Materials and Assemblies,” SAE Standard J1400 May 1990
- ASTM E2249 Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Buildup Partitions and Elements Using Sound Intensity ASTM International 2008
- Telecommunications: Glossary of Telecommunication Terms Federal Standard 1037C 1996
- Watson, R. Downey, O. The Little Red Book of Acoustics: A Practical Guide Blue Tree Acoustics 2008
- Harris, Cyril M Handbook of Acoustical Measurements and Noise Control Acoustical Society of America 3rd 1998