When creating a sensor on a construction site, it is possible to adjust the sensitivity of the sensor. To manage the cases of different sound backgrounds depending on the locations of the sensors (near a wind tunnel, ...), It is possible to put a sensitivity on a sensor. That is, it is subject to the same threshold as the others, but taking into account the a delta of sensitivity. This option is found in the editing / creation screen of the sensor.
Example: If the threshold is 80db and the sensitivity of the Sensor 11 is 5, the graphs and information will be those measured, but the alerts will only be lifted if the sound level raised exceeds the threshold + sensitivity.
Note: It is possible to add negative sensitivities.