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An Assistive Device for Direction Estimation of a Sound Source.

A wearable assistive device is proposed that visually indicates the direction of a sound source for people who cannot hear but can see when a loud sound occurs. The device has been implemented in the shape of common eyeglasses, so that it does not draw attention to the wearer's hearing impairment. A...

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Published in:Assistive Technology Vol. 25; no. 4; pp. 216 - 222
Main Authors: Kim, Ki-Won, Choi, Jung-Woo, Kim, Yang-Hann
Format: pictorial research tables/charts Journal Article
Published: Taylor & Francis Ltd Winter2013
Online Access:View this record in EBSCOhost
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      dt: Winter2013
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      pub: Taylor & Francis Ltd
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        atl: An Assistive Device for Direction Estimation of a Sound Source.
      aug:
        au:
          Kim, Ki-Won
          Choi, Jung-Woo
          Kim, Yang-Hann
        affil: Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
      sug:
        subj:
          Assistive Technology Devices
          Sound
          Deafness
          Hearing Disorders
          Product Development
          Acoustics
          Eyeglasses
          Physics
          Evaluation Research
          Human
          Funding Source
      ab: A wearable assistive device is proposed that visually indicates the direction of a sound source for people who cannot hear but can see when a loud sound occurs. The device has been implemented in the shape of common eyeglasses, so that it does not draw attention to the wearer's hearing impairment. Acoustical information is acquired by an array of microelectromechanical-system microphones attached to the eyeglasses. The direction of a sound source is estimated in real time and indicated to the user via four light-emitting diodes designating the front, back, left, and right directions. Two methods for estimating the sound direction were compared: delay-and-sum beamformer and sound pressure level (SPL) comparison. The performance of the directional estimation was evaluated using the head-and-torso simulator. The SPL comparison method was 92% accurate versus the 84% accuracy of the delay-and-sum beamformer approach.
      pubtype: Academic Journal
      doctype:
        pictorial
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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