Hearing Instrument Testing Using Hit440; Testing Hearing Instruments - Interacoustics Affinity 2.0 Additional Information

2.0
Affinity Additional Information
3.6

Hearing Instrument Testing using HIT440

Hearing Instrument Testing (HIT) is performed in order to verify that the hearing aids are technically
functioning as they should. It is usually performed after fitting the hearing aid or during a repair appointment.
When performing HIT there are certain things you should keep in mind in order to get the best possible
result. Some of these will inevitably also influence the precision of the curve obtained. This section will walk
through some important tips and tricks to remember when tasking hearing aids using the HIT440.
The following section will provide you with general knowledge relevant for hearing instrument testing using
the HIT440.
Correct placement of a hearing aid in the test box
Positioning the hearing aid correctly in the test chamber is important in order to obtain precise
measurements.
3.6.1

Testing Hearing Instruments:

4
2
1) Connect either the 2cc coupler or the 711 coupler to the coupler microphone and attach the relevant
adaptor to the coupler. The parts will click easily together.
5
6
3
1
Adaptor (BTE) Coupler
1) Coupler microphone
2) Ear simulator/711 coupler (optional)
3) 2cc coupler
4) Adaptor for body worn hearing aids
5) Adaptor for BTE hearing aids
6) Adaptor ITE hearing aids
Microphone
Page 262