Print Email Facebook Twitter Enhanced awakening probability of repetitive impulse sounds Title Enhanced awakening probability of repetitive impulse sounds Author Vos, J. Houben, M.M.J. TNO Technische Menskunde Publication year 2013 Abstract In the present study relations between the level of impulse sounds and the observed proportion of behaviorally confirmed awakening reactions were determined. The sounds (shooting sounds, bangs produced by door slamming or by container transshipment, aircraft landings) were presented by means of loudspeakers in the bedrooms of 50 volunteers. The fragments for the impulse sounds consisted of single or multiple events. The sounds were presented during a 6-h period that started 75 min after the subjects wanted to sleep. In order to take account of habituation, each subject participated during 18 nights. At equal indoor A-weighted sound exposure levels, the proportion of awakening for the single impulse sounds was equal to that for the aircraft sounds. The proportion of awakening induced by the multiple impulse sounds, however, was significantly higher. For obtaining the same rate of awakening, the sound level of each of the successive impulses in a fragment had to be about 15-25 dB lower than the level of one single impulse. This level difference was largely independent of the degree of habituation. Various explanations for the enhanced awakening probability are discussed. © 2013 Acoustical Society of America. Subject HumanPCS - Perceptual and Cognitive SystemsBSS - Behavioural and Societal SciencesAcoustics and AudiologyBuilt Environment To reference this document use: http://resolver.tudelft.nl/uuid:5c06d1de-bc2a-4aa6-935b-b412259c5966 DOI https://doi.org/10.1121/1.4817923 TNO identifier 478817 ISSN 0001-4966 Source Journal of the Acoustical Society of America, 134 (3), 2011-2025 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.