Pedersen B
Scand Audiol. 1984;13(3):205-6. doi: 10.3109/01050398409043061.
Earmoulds according to the horn principles often lack the necessary space for a vent parallel to the sound canal. The present paper shows that a 2 mm vent ending in the sound canal itself near the tip of the earmould does not affect the frequency characteristics of the hearing aid measured at the eardrum.
