FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
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130 FONIX <strong>FP35</strong> Hearing Aid Analyzer<br />
Probe Mic<br />
ER3<br />
INSERT<br />
EARPHONE<br />
To Probe Mic<br />
Foam plug or<br />
custom earmold<br />
Figure 5.3.6.2A—Insert probe microphone Figure 5.3.6.2B—Insert foam eartip connected<br />
to insert microphone<br />
5.3.6.3 Taking the RECD Measurement<br />
If you’ve performed the steps described in Sections 5.3.6.1 and 5.3.6.2, you just<br />
have to press [START/STOP] to take the RECD measurement. Results will be<br />
displayed in graphical format in dB GAIN as well as numerical format in the<br />
data table.<br />
To erase the measured RECD, press [F4] and [START/STOP].<br />
See Chapter 6: 2CC-Targets for information on performing coupler measurements<br />
to a target.<br />
5.3.7 Measuring the Real-Ear to Dial Difference<br />
The real-ear to dial difference (REDD) is the difference between an audiometer‘s<br />
output in dB HL and the unaided response of the client in dB SPL.<br />
To take the REDD measurement on the <strong>FP35</strong> analyzer, you perform a probe<br />
microphone measurement using an insert earphone or the sound field speaker<br />
as the transducer of the test. In other words, when you perform an RECD measurement<br />
(using an insert earphone), or an REUR measurement (using the sound<br />
field speaker), you get the REDD as an added bonus.<br />
• When SPEAKER is selected in the ASSESSMENT field in the menu, the<br />
REUR and REDD are obtained simultaneously by taking a sound field<br />
unaided measurement.<br />
• When INS EAR is selected in the ASSESSMENT field, the RECD and<br />
REDD are obtained simultaneously by taking an unaided measurement<br />
using an insert earphone.