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Condenser Microphone Protective Grid Correction for High Frequency MeasurementsUse of a protective grid on small diameter microphones can prolong the lifetime of the unit, but the high frequency effects can complicate data interpretation. Analytical methods have been developed to correct for the grid effect at high frequencies. Specifically, the analysis pertains to quantifying the microphone protective grid response characteristics in the acoustic near field of a rocket plume noise source. A frequency response function computation using two microphones will be explained. Experimental and instrumentation setup details will be provided. The resulting frequency response function for a B&K 4944 condenser microphone protective grid will be presented, along with associated uncertainties
Document ID
20100020892
Acquisition Source
Marshall Space Flight Center
Document Type
Abstract
Authors
Lee, Erik (NASA Marshall Space Flight Center Huntsville, AL, United States)
Bennett, Reginald (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
April 19, 2010
Subject Category
Acoustics
Report/Patent Number
M10-0112
Report Number: M10-0112
Meeting Information
Meeting: Acoustical Socity of America Conference
Location: Baltimore, MD
Country: United States
Start Date: April 19, 2010
End Date: April 23, 2010
Funding Number(s)
CONTRACT_GRANT: NNM05AB50C
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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