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 41<br />
16. Use [F2] <strong>to</strong> select ano<strong>the</strong>r envelope. Repeat steps 13 <strong>and</strong> 14 above.<br />
17. Compare <strong>the</strong> unaided <strong>and</strong> aided envelopes <strong>and</strong> point out <strong>the</strong> Speech<br />
Intelligibility Index (SII) values <strong>to</strong> <strong>the</strong> patient. In this case, <strong>the</strong> unaided SII (E1)<br />
was 30 <strong>and</strong> <strong>the</strong> aided SII (E2) was 59, or an improvement of 29%. These values<br />
represent <strong>the</strong> percentage of <strong>the</strong> speech signal that is audible <strong>to</strong> <strong>the</strong> user <strong>and</strong><br />
often convey more meaning <strong>to</strong> patients <strong>and</strong> <strong>the</strong>ir family members than a<br />
frequency response curve or a decibel value.<br />
Figure 54 – Visible Speech aided response<br />
Note…Visible speech is a test measurement that should be experimented with in <strong>the</strong> clinic.<br />
Each clinician will find different display settings <strong>and</strong> demonstrations that he or she will find most<br />
useful. For example, one may demonstrate <strong>the</strong> improved SII that results from turning up <strong>the</strong><br />
volume control or may demonstrate <strong>the</strong> decrease in <strong>the</strong> SII that results from <strong>the</strong> spouse or<br />
family member turning <strong>the</strong>ir back <strong>to</strong> <strong>the</strong> patient when <strong>the</strong>y are speaking.