112 FONIX FP35 Hearing Aid Analyzer
Audiogram
Entry
Real-Ear SPL
Real Ear
Unaided & Aided
Insertion Gain
Figure 5.1.2—Real-ear navigation using next and back keys
5.2 Real-Ear Setup
If you are using the FP35 as a portable unit, you can easily convert the internal
sound chamber into a sound field speaker. If you are using the FP35 primarily
in an office or clinical setting, you may wish to set up an external speaker for
real-ear measurements.
5.2.1 General Setup
If not already in place, slide the Velcro mounting sleeves onto the reference
microphone and probe microphone.
When testing, the loudspeaker should be about 12 inches (30 cm) from the
surface of the client’s head (near the temple) and pointing toward the ear to be
tested. We recommend an azimuth angle of 45 degrees (halfway between the
client’s nose and ear). The height of the loudspeaker should be level with, or a
little above the ear. See Figure 5.2.1.
Top View
Speaker
(45 degrees)
12"
Reference Mic
Probe Mic
12"
Reference Mic
Probe Mic
Front View
Speaker
(45 degrees)
FONIX FP35 Hearing Aid Analyzer
Figure 5.2.1—Real-ear measurement setup
