Welch Allyn OAE Hearing Screener - User Manual - Manual (Page 38)

Welch Allyn OAE Hearing Screener Directions for Use 705353 Rev F 37
Note: Normal hearing is defined as pure tone audiometric threshold of 20 dB HL or better at each test
frequency.
Frequency Specific Performance Estimates
Frequency (Hz) Sensitivity Specificity
2000 0.8 0.85
3000 0.87 0.83
4000 0.89 0.88
5000 0.9 0.88
Table 2: Frequency specific Sensitivity and Specificity estimates for each tested frequency range
Changing the DPOAE Default Protocol to Continue through All
Frequencies
If you would like the system default DPOAE protocol to test all of the frequencies even after
conditions for an overall Pass or overall Refer are met, you can load a new default protocol into
your Welch Allyn OAE Hearing Screener.
1. Using Windows Explorer do one of the following depending on operating system in use:
• In Windows 7 open the directory C:\Users\Public\Documents\Welch Allyn\Welch
Allyn OAE Load.
• In Windows XP open the directory C:\Documents and Settings\All
Users\Documents\Welch Allyn\Welch Allyn OAE Load.
2. Delete the file named “default.adx”.
3. Locate the folder named “AA” and open it.
4. Select and copy the file named “default.adx” contained in the AA folder.
5. Return up one level to the WA OAE Load directory.
6. Paste the copied “default.adx” file into the WA OAE Load directory.
7. Exit Windows Explorer.
8. Connect the screener to the PC using the provided communication cable.
9. Launch the WA OAE Load program.
10. Select Start to load the firmware into the screener.
See Chapter 13 if you need additional instructions about how to install the WA OAE Firmware
onto the screener.
1. Gorga MP, Neely ST, Ohlrich B, Hoover B, Redner J, Peters J. (1997). From laboratory to clinic: a large scale study of
distortion product otoacoustic emissions in ears with normal hearing and ears with hearing loss. Ear & Hearing. 18: 6,
440-455.