Measure dB around current

Noise can be measured easily.

[function]
1. Check the minimum / maximum / average / current noise.
2. There is a function to compensate the dB.

20dB: clock second hand, the sound of banging on the leaves
30dB: midnight suburbs, whispering sounds
40dB: Library, weekly quiet house
50dB: Quiet office
60dB: Quiet passenger car, normal painting
70dB: telephone (0.5m), noisy office
80dB: Noise in the subway car
90dB: In a factory with high noise,
100dB: Railway noise when passing through a train
110dB: Horn Noise of Car
120dB: Flying aircraft takeoff noise