•
Select additional lists for testing if necessary
•
To interpret the
SNR
loss score see table below.
SNR
LOSS
DEGREE OF SNR
LOSS
EXPECTED IMPROVEMENT WITH DIRECTIONAL
MIC
0-3 dB
Normal / near normal
May hear better than normals hear in noise
3-7 dB
Mild SNR loss
May hear almost as well as normals hear in noise
7-15 dB
Moderate SNR loss
Directional microphones help; consider array mic
>15 dB
Severe SNR loss
Maximum SNR improvement is needed; consider FM system
AZBio and AZBio Pediatric
The AZBio are speech in noise tests that may be used for evaluation of cochlear
implant candidates or recipients. The word lists are located in the Word Lists
menu under CD name in the Speech Test Type screen. Each CD contains 15 lists
of 20 sentences each.
Test Procedure
•
Select the desired list from “word lists” in the navigation menu.
•
Verify that the test type is correct (WRS).
•
Ensure that auto advance is NOT selected in the word navigation option
so each word in the sentence may be scored.
•
Set Channel 1 to INT A and Channel 2 to INT B.
•
Press Ch2 Int/Ext B button a second time and ensure the signal is routed
to the same ear as Ch1.
•
Press the interlock button to present speech and noise together.
•
Score each word in the sentence using the Correct/Incorrect buttons.
•
Select additional lists and continue testing if part of the test protocol.
•
Press Store to save the test results.