Active Control in Hearing Aids
Event details
| Date | 14.11.2012 |
| Hour | 10:15 |
| Speaker | Thomas Zurbrügg, Phonak |
| Location |
ELA2
|
| Category | Conferences - Seminars |
Today's hearing aids are basically designed to amplify sounds. While increasing the sound pressure is a necessary, obviously fundamental pre-condition for a hearing instrument to be effective, it is not sufficient for obtaining a full control over the sound pressure in the hearing aid user's ear. For example, the occlusion effect, due to the closure of the external ear by the hearing aid device, deteriorates the performances of the latter by reinforcing the low frequency rendering, thus affecting the perception of the user’s own-voice. Active control is based on destructive interference between an unwanted acoustic sound wave and its phase-shifted replica created by a secondary sound source, and thus allows to actively attenuate sound. While a feed-forward approach allows to cancel unwanted direct sound, a feedback approach provides the additional potential to reduce the occlusion effect, thus improving the perception of a hearing aid user's own voice. This talk is intended to give a general overview, starting with an introduction to the basics of hearing, hearing aids and control theory, discussing several specific aspects of active control in hearing aids and concluding with results based on both simulations and measurements.
Practical information
- General public
- Free
Organizer
- Lissek Hervé <[email protected]>
Contact
- Lissek Hervé <[email protected]>