Performing Speech Audiometry - natus Madsen A450 User Manual

13 Performing speech audiometry

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
when
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
7. Use the
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 (
– Audiogram threshold (
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
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
Talk Forward
is active.
Present
Store button (the S key on the keypad) to store the data point and proceed to the next frequency.
Mask
button or M on the keypad)
AUD ), MCL
Technical specifications
button. You can talk to the patient to adjust the patient communication levels
button or the space bar on the keypad.
and UCL
►
23.
A. Menu bar
B. Audiometry toolbar
C. Stimulus and scoring bar
D. Control panel
E. Work area
Feature boxes
F.
G. Audiogram
Madsen A450