Vibrotactile Identification of Signal-Processed Sounds from Environmental Events Presented by a Portable Vibrator: A Laboratory Study

  • سال انتشار: 1387
  • محل انتشار: مجله توانبخشی ایرانیان، دوره: 6، شماره: 1
  • کد COI اختصاصی: JR_IRJU-6-1_005
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 155
دانلود فایل این مقاله

نویسندگان

Parivash Ranjbar

Örebro University Hospital, Örebro, Sweden.

چکیده

Objectives: To evaluate different signal-processing algorithms for tactile identification of environmental sounds in a monitoring aid for the deafblind. Two men and three women, sensorineurally deaf or profoundly hearing impaired with experience of vibratory experiments, age ۲۲-۳۶ years. Methods: A closed set of ۴۵ representative environmental sounds were processed using two transposing (TRHA, TR۱/۳) and three modulating algorithms (AM, AMFM, AMMC) and presented as tactile stimuli using a portable vibrator in three experiments. The algorithms TRHA, TR۱/۳, AMFM and AMMC had two alternatives (with and without adaption to vibratory thresholds). In Exp. ۱, the sounds were preprocessed and directly fed to the vibrator. In Exp. ۲ and ۳, the sounds were presented in an acoustic test room, without or with background noise (SNR=+۵ dB), and processed in real time. Results: In Exp. ۱, Algorithm AMFM and AMFM(A) consistently had the lowest identification scores, and were thus excluded in Exp. ۲ and ۳. TRHA, AM, AMMC, and AMMC(A) showed comparable identification scores (۳۰%-۴۲%) and the addition of noise did not deteriorate the performance. Discussion: Algorithm TRHA, AM, AMMC, and AMMC(A) showed good performance in all three experiments and were robust in noise they can therefore be used in further testing in real environments.

کلیدواژه ها

Environmental sound, Identification, Narrow-band, Tactile perception, Transposing, Vibration

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.