WinCHAP User’s Manual Hearing Aid Measurements 91
When using WinCHAP to do a research project, it is often useful to be able to
cut and paste the measurement data into a spreadsheet such as Excel. This can
be done in WinCHAP by right clicking on the measurement data. Choose
Copy
All to copy all the displayed measurement data to your computer’s clipboard.
You can then go to your spreadsheet project and use CTRL+V to paste the data
there.
If desired, you can also copy a limited amount of data. Click and hold down
the left button of your mouse and use it to select the data you want to copy.
Unfortunately, this data is not visibly highlighted, but it is invisibly selected
(we will add the highlighting in a future software revision of WinCHAP). Then
use your right mouse button and select Copy Selection. This will copy only the
selected data to the clipboard.
The Response Curves and Real-Ear windows also display a second data list
-
ing containing any harmonic distortion measurements taken when measuring
the curves. The automated test sequence windows may also contain data from
input/output measurements.
7.2.5 Understanding the curve parameters
Every graphical test display has a corresponding window showing the param-
eters used when taking each response curve measurement. In an automated test
sequence, you get to this display by clicking the
Data button and choosing the
Curve Parameters tab. In the Response Curves and Real-Ear windows, you get
to this display by choosing the Curve Parameters tab in the main window. See
Figure 7.2.5 for the curve parameters display of the Response Curves window.
There are 22 curve parameters. Here is a short explanation of each parameter:
• Crv. Signal Type—The type of signal used to perform the test (for exam
-
ple, composite)
• Distortion Status—Notes the type of distortion measured (for example,
total harmonic distortion)
• Insitu Correction—Notes whether or not an insitu correction has been
used.
• Reference Mic—Records whether the reference mic is on or off.
• Smoothing—Notes whether or not smoothing was used.
• Environment—The place the test took place (for example, sound chamber).
• Applied Filtering—Notes the use of filtering in the measurement.
• Leveling Status—Records the degree of leveling achieved for the test.
• Curve Values—The type of values used (for example, gain or SPL).
