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anticipated effectiveness of active noise control in propeller aircraft interiors as determined by sound quality testsTwo experiments were conducted, using sound quality engineering practices, to determine the subjective effectiveness of hypothetical active noise control systems in a range of propeller aircraft. The two tests differed by the type of judgments made by the subjects: pair comparisons in the first test and numerical category scaling in the second. Although the results of the two tests were in general agreement that the hypothetical active control measures improved the interior noise environments, the pair comparison method appears to be more sensitive to subtle changes in the characteristics of the sounds which are related to passenger preference.
Document ID
Document Type
Powell, Clemans A.
(NASA Langley Research Center Hampton, VA, United States)
Sullivan, Brenda M.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Aircraft Propulsion and Power
Distribution Limits
Work of the US Gov. Public Use Permitted.
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