Frye FONIX 7000 - Manual (Page 128)

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FONIX 7000 Hearing Aid Analyzer
5.2.5 Explaining the Menu Settings
There are only a couple of menu settings in the local menu of the ANSI 92
screen.
Misc. Settings
• Print Label—Status of the printing label. Choose ON or OFF.
• Printer—Printer used for printouts. Choose INTERNAL or EXTERNAL.
See Section 2.4.
5.3 IEC
The International Electro-technical Commission (IEC) standard in the interna-
tional community is analogous to the ANSI standard in the United States. Press
[F6] from the Opening Screen to enter the IEC Screen.
The IEC 118-7 standard was amended in 1994, and in July of 1995, the IEC
Option was changed to conform to that amendment. The IEC standard is the
equivalent of the Chinese National Standard.
Technical note:
Most of the IEC measurements are made with the aid set to reference test gain.
You can either set the aid to the reference test gain calculated by the 7000 ana-
lyzer, or you can set it to the reference test gain specified by the manufacturer
in IEC 118-7.
We calculate the reference test gain by the following method:
The reference frequency is measured at 90 dB SPL (value A) and 60 dB SPL
(value B).
• If B > A—68, the calculated reference test gain is A—75
• Otherwise, the calculated reference test gain is B—7.
5.3.1 Setting up for IEC
1. Set the controls on the aid to give the maximum output and gain. For AGC
aids, this is usually accomplished by setting for the minimum compression.
2. Set the aid for the widest frequency response range.
3. Insert the appropriate battery simulator pill, but do not yet plug it into the
battery voltage supply.
4. Attach the aid to the appropriate coupler. See Section 5.2 for details. When
testing a BTE aid, use the BTE adapter and a 0.6” (15 mm) length of #13
thick walled tubing. The combined length of the BTE adapter and the tub-
ing is the right length to meet the specification (once you have inserted the
ear hook into the tubing).