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Cabin Noise Effects on Passengers' In-flight Activities: Communication and Cognitive Performance

Quehl, J. and Pennig, S. and Müller, U. and Rolny, V. (2011) Cabin Noise Effects on Passengers' In-flight Activities: Communication and Cognitive Performance. 1st International :envihab Symposium, 23.-24. Mai 2011, Köln.

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Abstract

Passengers’ comfort represents a key concept in the research on user acceptance of modern aircrafts. Aircraft cabin noise may interfere with passengers’ in-flight activities such as communication and cognitive performance and reduce comfort sensation. Experiments were performed in the acoustic laboratory at the DLR-Institute of Aerospace Medicine, Cologne (N=90) and in the aircraft cabin simulator Do728 at DLR-Göttingen (N=109). A 3 (SPL) x 3 (frequencies) design was applied to both studies. Frequencies were applied by the presentation of noise samples recorded at different seat locations in a real aircraft. For front and middle noises, levels of 66, 70, and 74 dB(A) were presented, for noises in the rear section levels of 70, 74, and 78 dB(A) were given. Communication interference was determined by subjective evaluations and the measurement of speech intelligibility of loudspeaker announcements (i.e. number of correctly understood words in the Oldenburg sentence test, Wagener et al., 1999) given at a constant level of 70 dB(A). Noise-induced performance effects were operationalized in the first study by using a three-minute version of a psychomotor vigilance task (PVT), a simple, high-signal-load reaction time test. Since the effect of cabin noise on the reaction times of the PVT was not significant, a three-minute computer version of the d2 test of attention (Brickenkamp, 2002) was designed for the second study. In both studies intelligibility decreased significantly with increasing sound pressure level. Words presented during cabin noise exposure to the front section were understood worse than in any other seat positions. Evaluations of the treatments with respect to subjective speech intelligibility verified this effect. Neither for the PVT nor for the d2 test of attention, a significant influence of sound pressure level and frequency was found by regression analysis.

Document Type:Conference or Workshop Item (Poster)
Title:Cabin Noise Effects on Passengers' In-flight Activities: Communication and Cognitive Performance
Authors:
AuthorsInstitution or Email of Authors
Quehl, J.julia.quehl@dlr.de
Pennig, S.sibylle.pennig@dlr.de
Müller, U.uwe.mueller@dlr.de
Rolny, V.UNSPECIFIED
Date:2011
Keywords:aircraft cabin noise, future aircraft design, passenger comfort, speech inelligibility, loudspeaker
Event Title:1st International :envihab Symposium
Event Location:Köln
Event Type:Other
Event Dates:23.-24. Mai 2011
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Human Factors and Safety in Aeronautics
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Flight Physiology
Deposited By: Alina Sender
Deposited On:08 Jul 2011 09:43
Last Modified:08 Jul 2011 09:43

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