Feedback (acoustic feedback) | When a hearing aid whistles it is called feedback. The designation “acoustic feedback” is also used.
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Feedback is generated when amplified sound from the hearing aid receiver leaks back to the microphone and is reamplified. Feedback typically occurs when you move your jaw by chewing, yawning or the like.
When a hearing aid whistles, it is often caused by the situation the user is in.
Feedback may result from jaw movements (e.g. when chewing), using a tele-phone, or covering the hearing aid with a hat or scarf.
Feedback can also occur if an in-the-ear hearing aid or earmould does not fit tightly in the ear canal because, for example, it is incorrectly placed. On rare occasions, the reason for the feedback can be a hearing aid malfunction.
Sometimes it is acceptable that the hearing aid whistles, for example when the hearing aid is switched on while being placed in the ear or removed, or when not in use. This is especially the case with hearing aids designed for severe hearing losses.
 Adjust the position of the hook and tube of the behind-the-ear hearing aid, if they are incorrectly placed. |
| Send the hearing aid in for service, if the hook or tube is defective. |
| Ear wax in the hearing aid or ear canal should be removed. Feedback can occur if ear wax has accumulated in your ear canal. You should see your physician regularly to have ear wax removed. |
| Ask your hearing healthcare professional to check if the vent is too big and that you are placing the earmould or in-the-ear hearing aid correctly in your ear canal. |
Features that prevent feedback |
Some hearing aids are designed with features that minimise the risk of – or prevent – feedback whistling. This applies to our Senso Diva and Senso+ hearing aid series.
SEE ALSO:
Diva Feedback Cancelling
Automatic Feedback Manager
