Frye FONIX FP40D - Manual (Page 112)

104 FONIX FP40 Portable Hearing Aid Analyzer
7. Age of client.
8. Instructions for performing the SSPL 90 measurement.
Note: Once a measurement has been taken, the modification table will disappear from the display.
Figure 5.7.3—The SSPL 90 screen
5.7.4 Taking the SSPL 90 measurement
This measurement is always made with a pure-tone sweep in order to make sure the fitting is com-
fortable for the client even when presented with 90 dB SPL of sound at any frequency.
1. Press F5 to enter the SSPL 90 screen. See Figure 5.7.3 for a picture of this screen. The stars
on the graph correspond to the client’s UCL values converted to dB SPL using David Pascoe’s
predictions*.
2. Make any desired modifications to the displayed UCL values using the FREQUENCY and
AMPLITUDE knobs.
3. Adjust the reserve gain, if desired, using the knobs.
4. Put the aid in the sound chamber and prepare it for a sound chamber measurement.
5. Press START/STOP to start the 90 dB pure-tone sweep.