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THE INFORMATION CAPACITY OF PLAUSIBLE AUDITORY AUGMENTATIONS: PERCUSSION OF RECTANGULAR PLATES

Abstract For unknown physical objects, we often infer the “ground truth” (e.g., on material, hollowness, or thickness) that is hidden below the visual appearance by percussion, i.e., by knocking on them. Auditory augmentations embed digital information into physical objects by modulating their auditory feedback in a plausible way. Based on physically justified sound models, we are able to design auditory displays that blend seamlessly into the acoustic environment. We assume that magnitude estimations are easier for physical parameters than for abstract sound parameters, at least for untrained users. In two experiments we measured how listeners extract physical information (size, aspect ratio, material) from the sound of impacted rectangular plates. First, participants actively explored an augmented table through a ballpoint pen. The second experiment evaluated only unisensory auditory identification of physical parameters. The results let us estimate the total information capacity of such interactive sonifications with multidimensional (2D and 3D) parameter mappings. Despite using only natural sounds, the information capacity of both mappings was on par with a comparable 1D auditory augmentation and only slightly below 1D auditory displays based on more salient but implausible sound parameters. The results additionally allow a better understanding of human sound source identification in general.
Autor*innen Weger, M., Aurenhammer, M., Herrmann, T., Höldrich, R.
EditorInnen ISON, B.
Jahr 2022
Art der Arbeit full paper
Edition Proc ISON 2022 (ISON)
Monat 08
Name ISON
Ort Bremen (Deutschland)
Anmerkung procedure: peer-reviewed
Status veröffentlicht
Publikationsart Konferenzband-Beitrag