Computer Science – Sound
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813103d&link_type=abstract
American Astronomical Society, AAS Meeting #218, #131.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Computer Science
Sound
Scientific paper
In this poster we present sonification (the use of sound to convey information) techniques with an example applied to X-ray astronomy. We also present preliminary results of perception experiments. Using sonification we have identified frequencies in the Chandra X-Ray observations of EX Hya, a cataclysmic variable of the intermediate polar type. The frequencies corresponding to 2.44 and 28.3 mHz may be quasi-periodic oscillations characteristic of the source while those identified at 126, 258 and 386 mHz appear to be an instrumental effect. We have conducted perception experiments on 13 participants exposed to visual stimuli, auditory stimuli and visual and auditory stimuli together. The subjects were asked to identify signals in the presence of noise. They showed performance improvement when auditory stimuli were added to a visual display. The difference in performance between "sound only" and "visual graph only" is about 20 times larger. This may support the use of sound as an adjunct to data visualization in astronomy data analysis, especially when proper training is given to the users. The authors acknowledge the Smithsonian Institution Women Committee for sponsoring this research.
Brewster S.
Brickhouse Nancy
Diaz-Merced Wanda Liz
Mannone J.
Pomplun M.
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