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D-0116493-B (OM015) – PC850 Operating Manual
5.9.3. TEST
(1) Use the Clear test option to clear any thresholds
(2) Present the first test tone at 30dB at 1kHz
(3) If the patient responds, reduce the signal level in 10dB steps repeating the presentation until there is no
response; then increase the signal level in 5dB steps until the patient responds
(4) If the patient does not respond, increase the signal level in 5dB steps until there is a response and then
continue with step 5.
(5) Repeat the test by reducing the signal level in 10dB steps until the patient no longer responds. Then
increase the signal level in 5dB steps until a response occurs and note this level.
(6) Repeat step 5 until the patient responds three out of a maximum of five times at the same signal level.
This indicates the patient’s hearing threshold level for that frequency. Either mark the threshold on an
audiogram card or press the appropriate ear key once to activate the Threshold Retention Function and
save the threshold level on screen.
(7) Proceed to the next test frequency. It is common practice to test the frequencies in the following order:
1k, 2k, 3k, 4k, 6k, 8k and 500 Hz.
(8) Repeat steps 2 to 7 for the other ear.
5.9.4. POST-TEST
(1) Use the Threshold Retention Function to review the results
(2) If required do one or more of the following:
• Record the results on an audiogram card, or
• Save the results to the internal memory, or
• Transfer the results to a computer
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