threshold level for that frequency. Either mark the threshold on an
audiogram card or press the appropriate ear key once to activate the
Threshold Retention Function and save the threshold level on screen.
(6) Proceed to the next test frequency. It is common practice to test the
frequencies in the following order: 1k, 2k, 3k, 4k, 6k, 8k and 500 Hz.
(7) Repeat steps 1 to 6 for the other ear.
4.8 Post-test
(1) Use the Threshold Retention Function to review the results (See 3.5)
(2) If required do one or more of the following:
Record the results on an audiogram card, or
Print the results (Section 3.6), or
Transfer the results to a computer (Section 3.7)
Refer to Section 3.4.2 to clear the thresholds at the end of a test and, if
required, switch off the audiometer.
5 Specification
5.1 Output data
Outputs: Left and Right earphone
Frequency range: 125Hz to 8kHz
Frequency accuracy: <1%
Distortion: <2%
Output level range: -10dBHL min; see Section 5.2 for maximum
Output level accuracy: Within 3dB
Output level step size: 5dB
Output transducer: DD45 earphones (supplied)
Tone present: Single, warble or pulsed
Communication: Integral talk over facility
USB interface: Transfer of test results to a computer
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