Abstract
This research aims to quantify human reactions to short impulsive noise bursts with a rattle element, to complement research at NASA Langley Research Center on evaluating human response inside buildings to low-level sonic booms. While previous research has demonstrated effects of noise bursts of varying amplitudes on assorted cognitive tasks, more information is needed to indicate at what level and to what degree such noise bursts may impact human performance and perception. It is also thought that the addition of rattle, produced from the noise burst exciting assorted elements inside the building, could prove more detrimental to human responses than noise bursts alone. Seventeen participants each completed twelve 30-min sessions during which they were subjected to controlled yet randomly occurring 250 ms broadband noise bursts, either with or without a rattle component, while completing an arithmetic task utilizing working memory. Four different levels of noise bursts, from 55 to 70 dBA, were tested; accompanying rattle components were set to be 4 dBA louder than the associated burst, generated by a separate audio source. Results will be presented and compared to those from a similar test using just broadband noise bursts alone. [Work supported by a NASA Nebraska Space Grant.]
Published Version
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