Chapter 4 - Special Test Procedures
High Frequency Testing (Optional)
The administration of some aminoglycoside antibiotics and/or chemotherapies can cause a
sensory-neural hearing loss, typically observed in the high frequency ranges (above 12
kHz).
1. Installation of the High Frequency option is necessary for this test capability. Contact a
GSI representative for additional information.
2. Install the High Frequency earphones as shown in the following figures: High Frequency to
Booth, or High Frequency - No Booth.
3. Select the High Frequency audiogram display format by pressing the High Freq pushbutton
on the front panel.
4. Assist the patient with the placement of the High Frequency earphones.
5. Proceed as with pure tone threshold testing, recording the thresholds onto the audiogram.
High Frequency Testing: Setup Diagrams
TDH-50 Low
Frequency
Phones
Sennheiser
High Frequency Phones
High Frequency - No Booth
TDH-50 Low
Frequency
Phones
Sennheiser
High Frequency
Phones
High Frequency to Booth
4-5
1761-0100 Rev. B
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