D-0126021-A
14
Positioning Hearing
Instruments in the Test
Chamber
The AVANT HIT+ chamber utilizes a speaker located below the test surface.
When placing hearing instruments in the chamber, it is critical to place the
hearing instrument microphone adjacent to the reference microphone. The
center of the sound inlet of the hearing instrument microphone should be
between 2mm and 8mm from the center of the reference microphone. The
hearing instrument’s sound inlet should be directly above the fan shaped
marking on the test surface, and at the same distance (height) above the
foam surface of the test chamber as the reference microphone inlet. Proper
positioning for ITE, BTE and RIC hearing instruments are shown below.
Once the instrument is properly placed in the test chamber be sure the
hearing aid is on and connected to your fitting software and close the lid of
the chamber.
Note: If necessary, a neck loop or other connection device can be placed
inside the test box around the hearing instrument. Wireless programmers
will still maintain connection even when the box is closed.
BTE Hearing Instrument
ITE Hearing Instrument
RIC Hearing Instrument
