Interacoustics AC40 - Performing Transducer Calibration

AC40 Instructions for Use - US Page 29
SISI Test
SISI is designed to test the ability to recognise 1 dB increase in intensity during a series of bursts of pure
tones presented 20 dB above the pure tone threshold for the test frequency. It can be used to differentiate
between cochlear and retrocochlear disorders as a patient with a cochlear disorder will be able to
perceive the increments of 1 dB, as where a patient with a retrocochlear disorder will not.
Function Key
Description
10
Only available if High Frequency is available (optional license) on the
instrument. Selects the HF phone connected to the separate HF connectors.
11
Amplitude Modulation
16
Start SISI test.
17
Stop SISI test.