23
Below is an example of how the sound outlet, relief
vent and microphone opening may be positioned in a
hearing aid provided with a short vent and a full length
vent, respectively.
1. Sound outlet
2. Relief vent
(short)
3. Microphone opening
1. Sound outlet
2. Relief vent
(full length, outlet)
3. Relief vent
(full length, inlet)
4. Microphone opening