The sensitivity of microphones significantly determines the detection range of bat detection. As the sensitivity can vary due to component tolerances, it is essential to use calibrated microphones. This is the only way to achieve comparable results and determine correct values for the calculation of curtailment times.
As weather conditions can have a negative impact on the sensitivity of microphones, we recommend recalibrating used microphones after each monitoring season. In this way, you can guarantee the highest data quality and avoid legal problems with your recorded data .

Included services:

Checking and cleaning the microphones

Replacing  the foam windscreen ring on GM90 microphones

Determining the microphone sensitivity

Determining the level of the test signal speaker

Creation a calibration certificate