Frye FONIX FP40D - Manual (Page 109)

Real-Ear Measurements 101
Figure 5.6.2A—Coupler gain measurement with a DSL target
11. Press F5 to enter SSPL MODE. You should see a series of star symbols on the screen. These
symbols stand for the highest comfortable levels predicted for this patient. Again, make sure
the RESER is set to zero.
12. Press [START/STOP] to take a pure-tone 90 dB measurement. If the resulting measurement
is higher than the target symbols, those sounds will be uncomfortable for the patient. Try to
adjust the aid so the measurement only reaches at or below those symbols. See Figure 5.6.2B.
Figure 5.6.2B—SSPL measurement with DSL predicted upper limits of comfort
5.7 Coupler prescription (non DSL)
The object of the Target 2-cc screen is to prescribe a hearing aid using audiogram information, a
fitting formula, the choice of styles of hearing aids, age, and RECD information. All of these factors
are used to calculate the 2-cc target coupler that can be sent to a manufacturer or that can be used
to set the full-on gain of a hearing aid in the sound chamber. UCL data entered or generated in the
Target screen is used to generate a corresponding SSPL90 prescription.