Frye FONIX 7000 - Manual (Page 96)

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FONIX 7000 Hearing Aid Analyzer
3.5.5 Understanding Terminology
With the new testing terminology of hearing aid analyzers combined with the
new technology of hearing aids, it’s easy to get terminology confused. “Noise
Reduction” is a term that Frye Electronics has always used to denote the aver-
aging that the analyzer makes when analyzing data to achieve a smooth curve.
This process is described in Section 2.3.1.2 and Section 2.3.2.1.
Some high-end digital hearings have digital signal processing features that try to
detect noise in the environment and lower the gain at the frequencies in which
it detects the noise. Different manufacturers have different terminology for these
features, but they are most commonly called “Speech Enhancement,” “Noise
Suppression,” or “Noise Reduction.”
Just keep in mind that these are two separate applications of the phrase “Noise
Reduction” that mean two completely different things. When you set the Noise
Reduction on your FONIX 7000 test system, you are setting the amount of aver-
aging the analyzer does. When you set Noise Reduction on your hearing aid,
you are usually setting the amount of noise reduction that the hearing aid does.
3.6 CIC Feature
The CIC Feature is a way of performing a coupler test of a CIC hearing aid that
more accurately reflects the real-ear performance of that aid than a regular 2-cc
coupler measurement. It is not a way to check the manufacturing specifications
of CIC hearing aids because those specifications are based upon 2-cc coupler
measurements.
The CIC Feature consists of a CIC coupler (0.4 cc) and software correction fac-
tors. Both need to be used in order to correctly perform the measurement.
To measure a CIC hearing aid:
1. Attach the CIC coupler to the CIC aid just as you would attach an HA–1
coupler to the aid, and set the hearing aid up for testing as shown in Section
3.3.2.
2. Press [MENU] in the Coupler screen.
3. Highlight Coupler Type under Measurement Settings with [∨, ∧].
4. Select CIC with [<, >].
5. Press [EXIT].
6. Select the desired source type with [F5]. (Press [F5]. Use [∨, ∧] to select the
desired source type. Press [>] to complete the selection and close the pop-
up menu.)
7. Select the desired source amplitude with [∨, ∧].