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Vibratory-coded directional analysis: Evaluation of a three-microphone/four-vibrator DSP system
Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research.
Orebro Med Ctr Hosp, Ahlsen Res Inst, S-70185 Orebro, Sweden Karolinska Inst, Dept Physiol & Pharmacol, S-17177 Stockholm, Sweden Linkoping Univ, Dept Behav Sci, S-58183 Linkoping, Sweden Hitech Dev AB Aldermansvagen, S-17148 Solna, Sweden.
2001 (English)In: Journal of rehabilitation research and development, ISSN 0748-7711, Vol. 38, no 2, 257-263 p.Article in journal (Refereed) Published
Abstract [en]

A sound localization aid based on eyeglasses with three microphones and four vibrators was tested in a sound-treated acoustic test room and in an ordinary office. A digital signal-processing algorithm provided a determination of the source angle, which was transformed into eight vibrator codes each corresponding to a 45 degrees sector. The instrument was tested on nine deaf and three deaf-blind individuals. The results show an average hit rate of about 80% in a sound-treated room with 100% for the front 135 degrees sector. The results in a realistic communication situation in an ordinary office room were 70% correct based on single presentations and 95% correct when more realistic criteria for an adequate reaction were used. Ten of the twelve subjects were interested in participating in field tests using a planned miniaturized version.

Place, publisher, year, edition, pages
2001. Vol. 38, no 2, 257-263 p.
Keyword [en]
digital signal processing, directional aid, sound localization
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-49253OAI: diva2:270149
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

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Rönnberg, Jerker
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