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Reverberant Acoustic Testing and Direct Field Acoustic Testing Acoustic Standing Waves and their Impact on Structural ResponsesThe aerospace industry has been using two methods of acoustic testing to qualify flight hardware: (1) Reverberant Acoustic Test (RAT), (2) Direct Field Acoustic Test (DFAT). The acoustic field obtained by RAT is generally understood and assumed to be diffuse, expect below Schroeder cut-of frequencies. DFAT method of testing has some distinct advantages over RAT, however the acoustic field characteristics can be strongly affected by test setup such as the speaker layouts, number and location of control microphones and control schemes. In this paper the following are discussed based on DEMO tests performed at APL and JPL: (1) Acoustic wave interference patterns and acoustic standing waves, (2) The structural responses in RAT and DFAT.
Document ID
20130000153
Acquisition Source
Jet Propulsion Laboratory
Document Type
Presentation
External Source(s)
Authors
Kolaini, Ali R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Doty, Benjamin
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chang, Zensheu
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 27, 2013
Publication Date
June 19, 2012
Subject Category
Acoustics
Meeting Information
Meeting: Mechanical Systems Division/Dynamics Environments
Location: El Segundo, CA
Country: United States
Start Date: June 19, 2012
End Date: June 21, 2012
Distribution Limits
Public
Copyright
Other
Keywords
vibro-acoustics
acoustics
Reverberant Acoustic Testing (RAT)
Direct Field Acoustic Testing (DFAT)

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