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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Active Control in Hearing Aids
DTSTART:20121114T101500
DTSTAMP:20260406T212701Z
UID:fe3901672fd1221bc11f286a1c9f5c5e34983efa8ea16ae883cabfdb
CATEGORIES:Conferences - Seminars
DESCRIPTION:Thomas Zurbrügg\, Phonak\nToday's hearing aids are basically 
 designed to amplify sounds. While increasing the sound pressure is a neces
 sary\, obviously fundamental pre-condition for a hearing instrument to be 
 effective\, it is not sufficient for obtaining a full control over the sou
 nd pressure in the hearing aid user's ear. For example\, the occlusion eff
 ect\, due to the closure of the external ear by the hearing aid device\, d
 eteriorates the performances of the latter by reinforcing the low frequenc
 y rendering\, thus affecting the perception of the user’s own-voice. Act
 ive control is based on destructive interference between an unwanted acous
 tic 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 pro
 vides the additional potential to reduce the occlusion effect\, thus impro
 ving the perception of a hearing aid user's own voice. This talk is intend
 ed to give a general overview\, starting with an introduction to the basic
 s of hearing\, hearing aids and control theory\, discussing several specif
 ic aspects of active control in hearing aids and concluding with results b
 ased on both simulations and measurements.
LOCATION:ELA2
STATUS:CONFIRMED
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