Connecting The Hda 300 To An Audiometer And Calibrating The Audiometer; Storing The Hda 300 - Sennheiser HDA 300 Instruction Manual

Connecting HDA 300 to an audiometer and calibrating the audiometer
Connecting the HDA 300 to an audiometer and
calibrating the audiometer
In order to obtain accurate measurements, the audiometer has to be re-calibrated
on a regular basis and each time the audiometric headphones are exchanged. This
is necessary even if you change the climatic conditions.
Connecting the HDA 300
Connect the red plug of the headphones to the right channel and the blue plug
to the left channel of the audiometer.
Have an authorized specialist calibrate the audiometer together with the
HDA 300.
Preparing the HDA 300 for calibration
You can find the appropriate reference threshold sound pressure levels on the
fold-out page of the cover or at www.sennheiser.com on the product page for the
HDA 300.
1 Adjust the HDA 300 as shown in the diagram.
2 Place the ear cap on the middle of the coupler so the distance to the top,
bottom, left and right is identical.
143 mm
145 mm

Storing the HDA 300

Do not store the headphones stretched out for long periods as this can widen
the headband and reduce the contact pressure of the headphones.
Make sure that the headphone cable does not cross any passageway to avoid
anyone tripping over the cable.
Handle the headphones and the cable with care. Do not twist, damage or kink
the cable.
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