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An Experimental Method to Determine the Cut-Off Frequency of an Acoustical Free Field in a Non-Ideal Environment
Mechanical Engineering Department, Tafila Technical University, Tafilah, Jordan
- 1 Mechanical Engineering Department, Tafila Technical University, Tafilah, Jordan
Open Journal of Acoustics·Volume 08 (2018)·Pages 1–11·Published 2 March 2018·DOI10.4236/oja.2018.81001
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Abstract
The availability of ideal conditions like anechoic chamber to characterize some sound parameters, like sound intensity and sound power necessities the determination of free field and cut off frequency measurements. In this article, full experiment was executed at Wayne State University (Detroit-Michigan), to determine the cut off frequency in all directions; the obtained results showed that the free field can be determined for a specified space. So other tests can take place in this space avoiding regions where reflections and consequently noise can be found. Upon these results tests related to noise abatement in vehicles can be done in such environment.
KeywordsAcousticsCut-Off FrequencySound FieldsNoise
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