Practical aspects of making NAH measurements
Document Type
Conference Proceeding
Publication Date
5-17-1999
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
Practical issues to consider when making measurements for Nearfield Acoustical Holography (NAH) analysis are addressed. These include microphone spacing and placement from the test surface, number of microphones and array size, reference microphone number and placement, and filtering of the data. NAH has become an accepted analysis tool so that several commercial packages are available. Its application is limited to test surfaces that are fairly planar, lending itself well to tire testing, front of dash testing, engine face testing, etc. In order to achieve accurate NAH results, the measurement and analysis process must be clearly understood on a practical level. Understanding the advantages and limitations of NAH and the measurement parameters required of it will allow the user to determine if NAH is applicable to a particular test object and environment.
Publication Title
SAE Technical Papers
Recommended Citation
Dumbacher, S.,
Brown, D.,
Blough, J. R.,
&
Bono, R.
(1999).
Practical aspects of making NAH measurements.
SAE Technical Papers.
http://doi.org/10.4271/1999-01-1847
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/14261
Publisher's Statement
Copyright © 1999 Society of Automotive Engineers, Inc. Publisher’s version of record: https://doi.org/10.4271/1999-01-1847