FONIX® FP35 Touch - Frye Electronics

118 FONIX FP35 Hearing Aid Analyzer
Insertion Gain
Audiogram
Entry
Real Ear
Aided Gain
Figure 5.1.2—Real-ear navigation using next and back keys
Real-Ear SPL
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
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.
® FONIX FP35 Hearing Aid Analyzer
OPERATE
Top View
Probe Mic
Reference Mic
12"
Speaker
(45 degrees)
Figure 5.2.1—Real-ear measurement setup
Reference Mic
12"
Speaker
(45 degrees)
Front View
Probe Mic