FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
FONIX® FP35 Touch - Frye Electronics
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Chapter 6 177<br />
2-CC Targets<br />
The 2-cc target screens allow you to measure hearing aids using a coupler in a<br />
sound chamber and compare them to a target. This type of testing is especially<br />
useful when fitting a patient who is unable to sit still for a real-ear measurement,<br />
such as an infant or a young child. There are two 2-cc Target screens<br />
available: the Coupler Target screen, which converts real-ear targets into coupler<br />
targets, and the Coupler EarSim screen, which converts coupler measurements<br />
into simulated real-ear measurements. The FONIX real-ear option is required<br />
to access these screens.<br />
The Coupler Target screens convert real-ear targets into coupler targets so that<br />
you can compare them to coupler measurements. Targets and measurements can<br />
be displayed in either dB SPL or dB GAIN.<br />
The Coupler EarSim screen uses the opposite approach, displaying actual realear<br />
targets. When coupler measurements are taken, the response curves are<br />
converted, using average or measured RECD transforms, into simulated real-ear<br />
measurements, which can then be directly compared to the displayed real-ear<br />
targets. Two displays are available: Insertion Gain and SPL. When the SPL display<br />
is selected, the patient’s HTL and UCL values are also displayed on the<br />
screen. These HTL and UCL values are identical to the ones that would be displayed<br />
in the real-ear SPL screen.<br />
The Coupler Multicurve (described in Chapter 3), Coupler Target, and Coupler<br />
EarSim screens are all connected to each other by the [NEXT] and [BACK] keys,<br />
similar to the way that the real-ear screens are connected to each other. Any<br />
measurements taken in one screen are automatically converted to the other<br />
screens, minimizing your measurement time.<br />
Coupler<br />
EarSim<br />
Coupler<br />
Multicurve<br />
Coupler<br />
Target