Vibratory-coded directional analysis: Evaluation of a three-microphone/four-vibrator DSP system
2001 (English)In: Journal of rehabilitation research and development, ISSN 0748-7711, Vol. 38, no 2, 257-263 p.Article in journal (Refereed) Published
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.
digital signal processing, directional aid, sound localization
IdentifiersURN: urn:nbn:se:liu:diva-49253OAI: oai:DiVA.org:liu-49253DiVA: diva2:270149