AmpliVox 240 - Test Procedure in Manual Audiometry; Post-Test Procedures for Manual Audiometry

Page 14 OM024-6 Model 240 Operating Manual
30dB, 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; wait 1 to 2 seconds and
present the tone again at the same level
(3) If the responses are consistent with the pattern of tone presentation
proceed to Section 4.4.3 and start measuring the patient’s hearing
thresholds; if not, repeat the familiarisation process
4.4.3 Test
(1) Present the first test tone at 30dB at 1kHz
(2) 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
(3) If the patient does not respond, increase the signal level in 5dB steps
until there is a response and then continue with step 4.
(4) 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 the patient responds and note this level.
(5) Repeat step 4 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.
(6) 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.
(7) Repeat steps 1 to 6 for the other ear.
4.4.4 Post-test
(1) Use the Threshold Retention Function to review the results (See 3.5)
(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 (Section 3.6), or
 Print the results (Section 3.8), or
 Transfer the results to a computer (Section 3.9)
Refer to Section 3.4.2 to clear the thresholds at the end of a test and, if
required, switch off the audiometer.