Venting of earmoulds with acoustic horn.
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.
D012048:Correction of Hearing Impairment; D006310:Hearing Aids / Q000592:standards*; D006801:Humans