Frye FP35 Manual

A SERVICE OF

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152 FONIX FP35 Hearing Aid Analyzer

Figure 5.7.3.2—Real-Ear IM distortion sweep

13. Set up the client, the aid, and the analyzer for real-ear testing. Make sure to

level the sound field speaker.

14. Press [START/STOP] to start the IM distortion sweep. See Figure 5.7.3.2.

The measurement will stop when finished. The percentage scaling for the

measurement is located on the right side of the graph. Notice the thick line

below the lower right corner of the graph. This is an indication that the cur-

rent selected measurement uses the right side scaling.

5.7.3.3 To change the frequencies used in the sweep

By default, the IM distortion sweep is performed at the frequencies used in the

NORMAL pure-tone sweep. This can be changed to perform the measurements

at fewer frequencies (for a faster test), and more frequencies (for a more com-

plete test).

1. Press [MENU] from the real-ear measurement screen to enter the real-ear

menu.

2. Press [NEXT] twice to enter the Custom Menu.

3. Use [

∨, ∧] to select DISTORTION SWEEP.

4. Use [<, >] to make one of the following selections:

• NORM:Tomeasureat1/12octavefrequenciesclosestto100Hzintervals

(default test)

• FAST:Tomeasureat1/3octavefrequenciesclosestto100Hzintervals

(fastest test)

• FULL:Tomeasureatevery100Hzinterval(mostcompletetest)