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The Dornier 328 Acoustic Test Cell (ATC) for interior noise tests and selected test resultsTo perform acoustic studies for achieving low noise levels for the Dornier 328, an acoustic test cell (ATC) of the Dornier 328 has been built. The ATC consists of a fuselage section, a realistic fuselage suspension system, and three exterior noise simulation rings. A complex digital 60 channel computer/amplifier noise generation system as well as multichannel digital data acquisition and evaluation system have been used. The noise control tests started with vibration measurements for supporting acoustic data interpretation. In addition, experiments have been carried out on dynamic vibration absorbers, the most important passive noise reduction measure for low frequency propeller noise. The design and arrangement of the current ATC are presented. Furthermore, exterior noise simulation as well as data acquisition are explained. The most promising results show noise reduction due to synchrophasing and dynamic vibration absorbers.
Document ID
19920023707
Document Type
Conference Paper
Authors
Hackstein, H. Josef (Dornier Luftfahrt G.m.b.H. Friedrichshafen, Germany)
Borchers, Ingo U. (Dornier Luftfahrt G.m.b.H. Friedrichshafen, Germany)
Renger, Klaus (Dornier Luftfahrt G.m.b.H. Friedrichshafen, Germany)
Vogt, Konrad (Dornier Luftfahrt G.m.b.H. Friedrichshafen, Germany)
Date Acquired
September 6, 2013
Publication Date
July 1, 1992
Publication Information
Publication: NASA. Langley Research Center, Fourth Aircraft Interior Noise Workshop
Subject Category
ACOUSTICS
Report/Patent Number
AIAA PAPER 92-2164
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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