otometrics madsen itera ii, Справочное руководство

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• You can store a maximum of four test frequencies, which you can select.
If you have stored two or more measurements at the same frequency, you can turn the frequency knob to step
through each of these measurements in turn before changing to the next frequency.
Deleting individual measurements
• To delete an individual measurement press
ERASE
once while the measurement is displayed. Other measurements at
the same frequency and at other frequencies remain unaffected.
If you change the signal type
If you start a test, and data is stored, you cannot just change the signal type. If you do, the system will not save the data.
The message "Not allowed" is displayed and the button(s) that has/have been wrongly set flash in the correct position
(three short flashes).
Masking
Note
•
The audiometer cannot perform masking during this test.
8.5 STENGER Test
The Stenger test is used to reveal a unilateral non-organic hearing loss in one ear.
1. Before you perform a Stenger test, measure the patient's tone thresholds for the left and right ears.
2. To select the Stenger test press SPECIAL (one or more times) until "STEN" appears.
3. Select the test by pressing
STEN
once. The following display appears:
A tone is transmitted at the same frequency on the left and right sides simultaneously.
The display shows the signal selected as stimulus. This is either TON, WRB or NBN. To change the stimulus, see
Changing stimulus
►
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4. Press either of the INT buttons to present the tone to the patient.
Changing dB level
1. You can change the dB level setting separately for the right and the left ear: Set the dB level to 10 dB above the
threshold in the better ear, and 10 dB below the threshold in the poorer ear.
2. You can present the signal in two ways:
– present the signal to the patient by pressing the INT button, or
– press the
REVERSE
button to keep the signal continuous. You can then interrupt the test signal by pressing the
INT
button.
Signal presentation (normal/ REVERSE ) follows the normal rules (see Stimulus/speech count buttons ► 24 ).
Changing stimulus
You can change the stimulus type from pure tone to Warble (WRB) or Narrow Band Noise (NBN). When you deactivate
these stimulus types, the stimuli return to pure tone (TON).
78 Otometrics - MADSEN Itera II
8 Special tests