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D-0115687-C (OM008) – 170 Operating Manual
(6) If the patient response switch is not being used give instructions to the
patient to acknowledge any tone presented by raising or lowering the
finger
(7) If the patient response switch is in use give instructions to the patient
to acknowledge any tone presented as follows:
“As soon as you hear the tone, press the switch. When you no longer
hear the tone, release the switch”.
(8) Fit the headset to the patient. Select the better hearing ear (according
to the patient) by pressing either the LEFT or RIGHT key and start the
familiarisation session.
4.4.2 Familiarisation
(1) Present the tone 30dB at 1kHz for between 1 and 2 seconds. If there
is no response at 30dB, increase the attenuation level in 10dB steps
until the patient responds
(2) When the patient responds, wait for 1 to 2 seconds and present the
tone again at the same level; however, if the patient does respond at
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) Use the Clear test option (see Section 3.4.2) 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 4.
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