The sensitivity is defined as the output voltage for a certain sound intensity.When the sensitivity is higher, the efficiency of sounds transform to electricity is higher.It is to be sensitivity to the feebleness sounds. In technical the sensitivity is defined as the output voltage for a 0.1pa acoustic stimulus and load condition. If a microphone’s sensitivity is 1mV/μBar, it means that the output voltage is 1mV fora 0.1pa acoustic stimulus and load condition.

It is always use the ‘db’ denote the microphone’s sensitivity