Automated Test Sequences 115
1. Run the ANSI test sequence.
2. Press [F6].
3. Use [
∨] to select Store Crvs Coup, if necessary.
4. Press [>] to store the curves and close the menu. The following is a list of
where the curves are stored in the Coupler screen. Any previous measure
-
ments stored in those curve locations will be overwritten.
• SPLITS – CRV 4
• VA CORFIG – CRV 5
• Response – CRV 6
• OSPL90 – CRV 7
5. Press [EXIT] and [F1] to enter the Coupler screen and view the ANSI
response curves.
5.1.9 Explaining the Menu Settings
The following is an explanation of all the ANSI menu selections:
Measurement Settings
• Noise Red (Tone)— The amount of noise reduction used in the pure-tone
measurements. See Section 2.3.1.2 for details.
• Battery Meas—The status of the battery current measurement. Turns it
ON or OFF. (Battery pill required for this measurement.)
• Battery Size—Size of the battery for the hearing aid being tested.
• 12 dB Dist—The status of the 12 dB harmonic distortion rule. When mea-
suring harmonic distortion, if the amplitude of the response at the sec
-
ond harmonic of the frequency being measured is 12 dB greater than the
amplitude of that primary frequency, the harmonic distortion measure
-
ment should be ignored at the primary frequency. Turn this rule ON or
OFF.
• Equiv Noise Test—Status of the EIN measurement. Turns it ON or OFF. In
ANSI 87 and ANSI 96, this should probably be turned off for compression
aids with a knee point below 60 dB SPL.
• Option—Option used with the test sequence. This can be CIC, which
adds CIC correction factors, (make sure to use the CIC coupler with
this option), or VA-CORFIG, which includes software correction factors
designed by the VA to produce a more realistic response curve than the
normal ANSI response curve.
ANSI Settings
• OSPL90 Sweep Start Delay—The delay after the first tone is presented in
the OSPL90 sweep and before the first measurement is taken.
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