Using the FONIX 7000 to Verify Coupler and Real-Ear Performance ...
Using the FONIX 7000 to Verify Coupler and Real-Ear Performance ...
Using the FONIX 7000 to Verify Coupler and Real-Ear Performance ...
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<strong>Real</strong> <strong>Ear</strong> Measurements 50<br />
Measuring how BICROS Overcomes <strong>the</strong> Head Shadow Effect<br />
Figure 63 – Measuring how well BICROS<br />
overcomes <strong>the</strong> head shadow effect<br />
First Measure<br />
Measuring if <strong>the</strong> REIG of a CROS fitting matches a valid prescriptive target<br />
Figure 64 – Measuring overall REIG <strong>to</strong> target for a CROS aid<br />
a. Reference microphone enabled <strong>and</strong> placed<br />
over <strong>the</strong> poor ear<br />
b. Probe microphone in <strong>the</strong> good ear<br />
c. Level<br />
d. Place receiver in <strong>the</strong> good ear <strong>and</strong> turned ON<br />
place transmitter over <strong>the</strong> poor ear <strong>and</strong> is OFF<br />
e. Measure <strong>and</strong> s<strong>to</strong>re as UNAIDED<br />
Second Measure<br />
a. Turn transmitter ON; measure <strong>and</strong> s<strong>to</strong>re as<br />
AIDED.<br />
b. Difference REIG curve shows benefit of adding<br />
<strong>the</strong> 2 nd microphone for signals arriving from <strong>the</strong><br />
poor ear.<br />
First Measure<br />
a. Reference microphone enabled <strong>and</strong> placed over <strong>the</strong><br />
poor ear<br />
b. Probe microphone in <strong>the</strong> good ear<br />
c. Level <strong>and</strong> s<strong>to</strong>re as UNAIDED<br />
Second Measure (REAG of good ear)<br />
a. Aid in good ear<br />
b. S<strong>to</strong>re as AIDED<br />
Difference REIG curve shows benefit from CROS aid <strong>to</strong><br />
target
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