Importance of a Good Seal
Operation
Note:
Hearing aids come with a large selection of ear tips,
including two sizes of 3-flange ear tips with long stems.
Depending on your ear geometry, the longer stems may
allow the best seal.
A good ear tip seal ensures the best performance and
prevents the “hollow voice” sound, called the occlusion
effect.
• The occlusion effect is caused by sound transmission
into the ear from vibration of the ear canal wall when the
ear is occluded by an ear tip.
• The vibration comes from sound pressure developed in
the back of the mouth.
• The occlusion effect is most commonly caused by
vibration from a person’s own voice, especially from
speaking the sounds “ee” and “uu,” or from playing a
brass or woodwind musical instrument.
• The occlusion effect is worse when there is a shallow
insertion of the ear tip.
ON/OFF
The hearing aids turn on and off
by opening and closing the battery door.
Note:
It is not necessary to remove the battery as long
as the door is open wide enough to disable the circuit.
Battery Door
Battery Door
OFF = Open
ON = Closed
