Product Manual

Directions for Use Operation 17
2. Select the L or R pushbutton to route the test tone to the selected ear.
3. Demonstrate the 1000 Hz tone at a 50 dB level. The tone duration should be between
1 and 2 seconds.
4. Repeat at 40 dB Hz.
Determining the threshold (Pure Tone)
1. Present the first tone at 50 dB in the subjects better ear, or if no preference, the right
ear. Decrease the intensity in 10dB steps until the subject no longer responds.
Increase the intensity in 5dB steps until the patient responds.
2. The threshold is considered to be the lowest intensity at which a response has
occurred two out of three times. Record this setting on the audiogram form using the
appropriate symbol for L (X) or R (O).
Testing procedure
1. A suggested order in which to present frequencies is as follows:
1000 Hz, 500, 250 repeat 1000, 2000, 3000, 4000, 8000 Hz.
An alternative order is as follows:
250 Hz, 500, 1000, 1000 again, 2000, 3000, 4000, 8000 Hz.
2. The 1000 Hz retest is to verify the results of the test to ensure the subject
understands the task.
If there is a difference of 20 dB or more between two successive octaves, test the
inter-octave responses (i.e., 750, 1500, 3000 Hz). Record this information on the
audiogram form.
3. Repeat for the other ear.
Note
Down 10 dB, Up 5 dB