–
Position the hearing instrument so that a line through the front and rear directional microphones coincide with
the loudspeaker axis.
BTE
Thin tube and RIE
ITE
2.
Positioning the reference microphone
–
As a rule of thumb, position the reference microphone as close as possible to the front microphone of the hearing
instrument without actually touching it.
Maximum permitted distances are:
Vertically (Y axis)
8 mm (above)
Sideways (X axis)
±12 mm
Back-to-front (Z axis)
±3 mm
Otometrics - AURICAL HIT
17
3 Testing hearing instruments
