Welch Allyn OAE Hearing Screener - User Manual - Manual (Page 36)

Value graph view
The value graph view uses different colors and symbols to differentiate the DP test
frequency for the left and right ear tests:
• Left ear: Dark blue line with “x” symbols indicate the DP test frequencies.
• Right ear: Red line with circles indicate the DP test frequencies.
On both the left and right ear value graphs, inverted triangles on a light blue line
represent the NF at each DP test frequency.
See “Change graph style” for instructions on how to switch the graph views between
SNR bar graph and value graph.
Change graph style
The Graph menu enables you to change between the SNR and value graph views.
1. See "Access menus" for how to access menus.
2. Press the DOWN control panel button to access the GRAPH menu.
3. Press the LEFT or RIGHT control panel button to change between the SNR and
value graph views.
Test techniques
As with other OAE test instruments, there are techniques to learn when using the
screener, especially when screening infants. Experience with existing OAE systems
suggests that it may take up to three (3) months to become completely proficient in
screening infants.
Test an infant
Note The best test results are obtained when an eartip is inserted into the ear
canal instead of flush with the ear canal.
When testing an infant with the screener, the infant has to be relatively quiet and calm; it
is preferable that the infant be sleeping. If the infant is awake:
32 Test results Welch Allyn ® OAE Hearing Screener