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Psychometric analysis of stationary aircraft sounds
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2006 (English)In: 13th International Congress on Sound and Vibration 2006, 2006, 3658-3664 p.Conference paper (Refereed)
Abstract [en]

The acoustical properties of aircraft sounds dynamically change during the time-history of the fly-over. It is therefore difficult to determine the relationship between the human perception of aircraft sounds and these acoustical changes. One option could be to use time continuous judgment to find relationships between acoustical and perceptual data, e.g. by applying cross-correlation methods. Since aircraft sounds comprise many acoustical features which might change simultaneously this method has a limited range of validity. To overcome such problem in the present study synthesized stationary aircraft sounds were used instead of the natural aircraft sounds. This allows the experimental variation of just one feature of interest at a given time. The sounds were generated to represent three different angles of the aircrafts flyover position relative to the observer at 78, 7°, 90° and 101, 3°. These three positions were found to cover a significant part of the acoustical phenomena which may occur during flyover, e.g. tonal components, fan noise, low-versus high frequency broadband effects, etc. Synthesis was performed based on the measurements of six different aircrafts and two flight conditions (take-off & arrival). All the sounds were equalized to have the same EPNL-level. The sounds were judged by 25 subjects using a multidimensional scale having five different attributes: loudness, annoyance, hardness, power and pitch. The statistical analysis of the data showed highly significant differences between the acoustical phenomena and all chosen perceptual attributes. The paper will present the applied methods and the results.

Place, publisher, year, edition, pages
2006. 3658-3664 p.
, 13th International Congress on Sound and Vibration 2006, ICSV 2006, 5
Keyword [en]
Acoustical properties, Cross correlation methods, Flight conditions, Human perception, Measurements of, Perceptual attributes, Psychometric analysis, Stationary aircraft, Safety engineering, Vibrations (mechanical), Aircraft
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-155027ScopusID: 2-s2.0-84883324399ISBN: 9781627481502OAI: diva2:760242
13th International Congress on Sound and Vibration 2006, ICSV 2006, 2 July 2006 through 6 July 2006, Vienna

QC 20141103

Available from: 2014-11-03 Created: 2014-10-29 Last updated: 2014-11-03Bibliographically approved

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Marcus Wallenberg Laboratory MWLAeronautical and Vehicle Engineering
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