otometrics AURICAL HIT User Manual page 10

5 Testing hearing instruments
5.2 Positioning the hearing instrument for testing
How you position the hearing instrument for testing in the test chamber depends on the type of hearing instrument or
device you wish to test.
Regardless of form factor (the type of hearing instrument), the only two important things to remember are:
• Aligning directional microphones along the loudspeaker axis.
• Positioning the reference microphone as close as possible to the front microphone of the hearing instrument without
touching it.
You can position the hearing instrument to perform all standard hearing instrument tests without repositioning the hear-
ing instrument between the individual tests:
• acoustic measurements,
• inductive telecoil measurements,
• directional microphone test.
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)
Sideways (X axis)
Back-to-front (Z axis)
5.3 Using the battery simulator
1. Select a battery simulator and insert it in the hearing instrument.
With AURICAL HIT you receive a set of 4 color-coded battery simulators, which are used to power the hearing instru-
ment. They are also used as probes for measuring the power consumption.
Red
Blue
Yellow
Green
2. Insert the mini-jack connector of the battery simulator in the bat-
tery simulator socket in the test chamber.
AURICAL HIT automatically detects the battery simulator.
Caution
•
sure that it does not touch other metal parts as this may short-cir-
cuit the system.
10
10A/230
675
312
13
When you have connected the battery simulator, make
8 mm (above)
±12 mm
±3 mm
Otometrics - AURICAL HIT