Calibrating and protecting microphones to allow acoustic measurements in hazardous environments
Document Type
Conference Proceeding
Publication Date
5-19-2009
Department
College of Business
Abstract
Performing acoustic measurements on or near engines, transmissions, as well as in other circumstances where the environment is hazardous and harsh for microphones requires special precautions. Fluids inevitably leak, and the possibility of transducer damage can be very high without proper protection. Properly protecting microphones during testing allows for consistent data quality in these hazardous and difficult environments. While this paper will present the use of a 5 mil Nitrile cover which protects against many fluids within the scope of automotive testing, including water, hydrocarbons, and alcohols, as well as having good heat resistance and high strength, the concepts developed are applicable to other types of microphone protective mechanisms. Acoustic sensitivity was measured and used to calculate the change of the microphone's response after the treatment is applied, as well as after being exposed to various contaminants. The sensitivity of the microphone due to the application of the protective covering will also be investigated. C
Publication Title
SAE Technical Papers
Recommended Citation
Walber, C.,
Blough, J.,
Anderson, C.,
&
Johnson, M.
(2009).
Calibrating and protecting microphones to allow acoustic measurements in hazardous environments.
SAE Technical Papers.
http://doi.org/10.4271/2009-01-2163
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2935
Publisher's Statement
Copyright © 2009 SAE International. Publisher’s version of record: https://doi.org/10.4271/2009-01-2163