Test Box Calibration Facts; Calibrating Test Box Reference Microphone - audioscan verifit User Manual

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Test box calibration facts

Test box microphone calibration establishes a correction curve for each uncalibrated test box reference

microphone by comparison with the factory calibrated coupler microphone. It may be performed as often as

desired but will be invalidated at 12 am the following day or at 12 am the following week, depending on the

choice of Daily or Weekly calibration interval. After the calibration has expired, the message window will turn

blue and you will be prompted to calibrate whenever you attempt a test that uses the test box microphones.

Your calibration curve should be similar to the one shown but may be at a different level. It should remain stable

over time. Irregularities in the calibration curve may be the result of not properly aligning the microphones. See

Calibrating test box reference microphone

Remove any coupler from the coupler microphone before calibration.

1. Position the test box reference microphones with their openings concentric with the binaural coupler

microphone openings and about 1 – 2 mm from as shown below.

2. Close and seal the test chamber.

3. Right-click the mouse and click [Calibration] under Test box.

4. Click [Calibrate] for each side. See Test box calibration facts

5. To change the calibration interval, toggle [Daily] or [Weekly].

6. To change the Weekly calibration day, right-click to raise the home menu, left-click [Setup], then left-click

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