Every microphone element (1 or 6 microphone array) must be calibrated separately. The central element of the calibration menu is the list of microphones contained in the current microphone element. The list has the columns:
- Microphone: The number of the microphone within the element.
- Previous value: Offset measured during previous calibration, displayed as comparison.
- Current value: The offset measured during this calibration.
- Compensation File: This is the File provided by mic manufacturer, which will be used for magnitude curve correction.
The type of the microphone element and the currently selected microphone within the element are indicated using an icon (green rectangle).
The soundcard the selected microphone shall be connected to are displayed above the list (yellow rectangle).
The reference sound pressure level of the calibrator can be selected in the upper right (red rectangle).
To calibrate a microphone:
- Choose the microphone you want to calibrate.
- Attach the microphone to the designated channel on the calibration device. Connect the calibrator to the microphone itself.
- Select the appropriate reference sound pressure level (SPL) for your calibration.
- Click the “Calibrate” button. The calibration process should take approximately 2 seconds.
- While calibration is running, observe the level meter (indicated as a black rectangle) for activity on the chosen input channel.
- The calibration will result in an offset value (displayed in red in the “current value” column).
- Choose to accept this value by clicking “Apply” (which will turn the value green) or repeat the calibration process if the value is not satisfactory.
- Clicking “Apply” confirms the calibration value, turns it green, and automatically selects the next microphone that needs calibration (if applicable).
Repeat the procedure for all microphones in the array.
Import: an existing calibration and compensation file path can be imported using “Import” option. This sets the current value for all microphones to the stored offsets. The values must be applied.
Individual microphones can be re-calibrated at any time. Once all calibration offsets are applied, the menu can be closed using “Ok”.
Export: A full set of applied calibrations along with compensation file path can be exported to disk using “Export”.