English called Sensitivity, which refers to the headset input every 1 mW of power when the headset can be issued by sound pressure level (sound pressure of the units are decibels, the greater the volume the greater the sound pressure), the unit is dB.Therefore, we can see that the higher sensitivity that the easier it is to speak out headphones. In addition, it means that the same volume of the headset under the high sensitivity to the details of the performance of more voices.