2. Prepare the patient. If you wish to instruct the patient after you have placed the transducers on the head of the
patient, you can use the
Talk Forward
button. You can talk to the patient to adjust the patient communication levels
when
Talk Forward
is active.
3. In the Control Panel, select test conditions for ear, transducer, unmasked/masked, and test type.
4. Select the test frequency with the Right/Left arrow buttons (or on keypad).
5. Select the stimulus level with the Up/Down arrow buttons (or on keypad).
6. Present the tone stimulus with the
Present
button or the space bar on the keypad.
7. Use the
Store
button (the S key on the keypad) to store the data point and proceed to the next frequency.
8. Repeat steps 4 to 7 until all the measurements you need have been completed. If needed, did you test:
–
Both ears
–
Air conduction
–
Bone conduction
–
Masking (
Mask
button or M on the keypad)
–
Audiogram threshold (
AUD
),
MCL
and
UCL
9. Save the audiogram.
Note
•
White noise can be selected for masking of pure tones. The white noise signal is calibrated for pure tone effect-
ive masking, i.e. the white noise sound pressure level varies with the pure tone frequency. If you wish to obtain a cer-
tain white noise level measured in dB SPL, you should use Conversion Table 2 to determine the appropriate
attenuator setting. See
.
13
Performing speech audiometry
A.
Menu bar
B.
Audiometry toolbar
C.
Stimulus and scoring bar
D.
Control panel
E.
Work area
F.
Feature boxes
G.
Audiogram
Whenever the test buttons and other functions are used, you can use the corresponding keys on the keyboard, or the on-
screen controls located at the top of the screen or in the Control Panel to the left.
18
Madsen A450
13 Performing speech audiometry
