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Run the index finger of the appropriate hand around the edge of the concha until the
finger is able to pull the D-Ring (
fig 13
). Then pull the D-Ring and device out of the ear.
Figure 13
APT-D Acoustic Push Button
The acoustic push button has four settings: Off, Single Tap, Double Tap and Hold &
Double Tap. For all types of switch functionality, the fingers should be held together and
the finger tips should lightly tap the outer part of the ear (
fig 14).
The tap should be a flat
pat on the ear that generates a “thud” like sound. It is the specific pressure wave
generated by this pat that actuates the switch. The pat should be soft and should never be
painful or severe enough to cause ringing in your ear.
