Augmentative communication based on realtime vocal cord vibration detection
- Författare
- Falk TH, Chan J, Duez P, Teachman G, Chau T.
- Titel
- Augmentative communication based on realtime vocal cord vibration detection
- Utgivningsår
- 2010
- Tidskrift
- IEEE Transactions on Neural Systems and Rehabilitation Engineering
- Volym
- 18
- Häfte
- 2
- Sidor
- 159-163
- Sammanfattning
A binary switch based on the detection of periodic vocal cord vibrations is proposed for individuals with multiple and severe disabilities. The system offers three major advantages over existing speech-based access technologies, namely, insensitivity to environment noise, increased robustness against user-generated artifacts such as coughs, and reduced exertion during prolonged usage periods. The proposed system makes use of a dual-axis accelerometer placed noninvasively in proximity of the vocal cords by means of a neckband. Periodic vocal cord vibrations are detected using the normalized cross-correlation function computed from anteriorposterior and superiorinferior accelerometry signals. Experiments with a participant with hypotonic cerebral palsy show the proposed system outperforming a popular commercial sound-based system in terms of sensitivity, task time, and user-perceived exertion. © 2010 IEEE.