natus Madsen A450, Руководство пользователя

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Note
• You should only use speech materials with a stated relationship between the level of the speech signal and
the calibration signal.
Speech materials delivered on CD or other media are normally accompanied by a description of this relationship.
You should follow the instructions supplied with the speech materials, using the VU-meter in Otosuite for adjust-
ment of input gain
If you are using built-in speech materials supplied with Otosuite, the speech levels have been adjusted according
to the original speech material instructions.
Note
•
Speech signals are calibrated in dB HL.
If you are using an integrated word list, the word list is shown on the screen.
9. Present the word lists with the
Play
button.
10. Use the Correct (+) and Incorrect (-) buttons or click directly on the key word to score.
11. Store the current data as the result, either by clicking
Store
in the highlighted field, or
by pressing (
S
) on the keyboard.
12. Repeat until all the measurements you need have been completed.
Dosimeter
A dosimeter is built into Madsen A450. If you are using live speech, it will be working in the background as a safety pre-
caution. The system monitors the sound level versus duration of exposure(1).
If the patient is exposed to excessive levels of noise during the session, the system will interrupt the signal and display a
warning.
(1)Noise Exposure: Explanation of OSHA and NIOSH Safe.Exposure Limits and the Importance of Noise Dosimetry by Patricia
A. Niquette, AuD, Etymotic Research Inc.
14 Maintenance
Madsen A450 requires regular maintenance to continue operating as designed. This includes visual inspection, cleaning,
and calibration. If the equipment shows signs of damage or material degradation, do not use the device and contact your
supplier.
20 Madsen A450
14 Maintenance