Audioscan Verifit 2 - Manual (Page 41)

Verifit ® User's Guide Version 4.2 © June 2015
1. Choose a quiet location and position the client and the sound-field speaker at least 1.5 m (5 feet) away from
any hard surfaces.
2. Position the client directly in front of, and facing, the sound-field speaker at a distance of 45 to 90 cm (18 to
36 in.) from the center of the head.
3. Position the back speaker (if used) directly behind and facing the back of the client’s head so that front and
rear speakers are at the same height and are at the same distance from the center of the client’s head.
Positioning the probe tube
1. Use an otoscope to ensure there is no ear canal obstruction (e.g. cerumen) and to get a sense of ear canal
length.
2. Install a new probe tube on the probe module. Set the black marker ring approximately 28 mm from end of
probe tube for adult females, approximately 30 mm from end of probe tube for adult males and
approximately 20-25 mm from end of probe tube for children. These positions may be modified based on the
otoscopic examination.
3. Clip the probe dock to the client's clothing, near the middle or to one side. If more convenient, it can
alternatively be clipped to the chair back or to a lanyard. It needs to be positioned so that the probe
microphone(s) will easily reach the subject's ear(s).
4. Hang the probe microphone on the ear, as shown below. The reference microphone should face outwards.
5. Adjust the blue or red lanyard until the probe microphone module is snug against the head, directly below the
earlobe (cheek level). Use the probe cables adjust clip to take up slack in the cables where necessary to
ensure correct positioning.
6. Pull the front lanyard so that it passes behind the ear canal entrance and pass the end of the probe tube in
front of the lanyard and into the ear canal.
7. Carefully slide the probe tube into the ear canal until the marker ring approaches the intertragal notch. Then
let the front lanyard move forward to hold the probe tube in place. Use an otoscope to verify that the tube is
2 to 5 mm from the eardrum.
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