Welch Allyn TM286 Auto Tymp - User Manual User Manual
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Operation
Welch Allyn TM286 Auto Tymp
particular frequency (e.g., 1000 Hz) is brought down 5 positions below the maximum dB
HL value (e.g., 65 dB HL for 1000 Hz) or the frequency is changed.
To save the threshold for a frequency, press the
button. The appropriate symbol (0
for right ear and X for left ear) for the test ear will replace the cursor. If no response (NR)
was measured, an arrow is attached to the 0 or X symbol on the audiogram. The last
threshold obtained and saved with the
button becomes the value saved in memory
and is the value printed on the audiometric test results.
To present the tone to the test ear, press the Present bar. A speaker symbol
appears
in the center of the screen for as long as the Present bar is depressed.
Screening audiometry
1.
Carefully position the earphones over the individual's ears so that the red phone
covers the right ear and the blue phone covers the left ear.
2.
Ensure that nothing is obstructing the earphones such as earrings, eye glasses or a
hearing aid.
3.
Instruct the person being tested to raise a hand or a finger (or press the optional
Handswitch) whenever a tone is heard.
4.
Encourage the patient to respond even if he/she thinks a tone is heard.
5.
Select the ear to be tested with the R (right) or L (left) button.
6.
Select the desired screening intensity by rotating the dB HL knob to the appropriate
position. The American Speech Language and Hearing Association recommends 20
dB as the screening level for school-age children. ( See
further information.)
7.
Select the starting frequency by pressing the
and
Hz buttons.
8.
Present the tone by pressing the Present bar.
9.
If the individual fails to respond, increase the intensity by 10 dB and try again. Press
the
button at the intensity level where the individual responded.
10. Continue the procedure for all the desired frequencies.
Audiometric Threshold
The TM286 provides two ways to perform Audiometric Threshold testing. The system can
be used in a Manual mode or an Automatic Hearing Level mode (Auto HL mode). In the
Manual mode, the intensity, frequency and presentation of the stimulus are controlled by
the tester. In the Auto HL mode, the system presents stimuli based on responses from
the Patient Response switch.
Manual Threshold Audiometry
1.
Carefully position the earphones and select the ear to be tested.
Note
Although the printout will combine the right and left ear test results on the same
audiogram or table, the screen can display only the results from one ear at a time.
Therefore, if an ear button (R or L) is selected while you are still testing a
particular ear, the screen will change to a new audiogram. If this happens, it is not
possible to return to an incomplete audiogram to complete the test sequence.
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