Decibel meter & Sound Meter

With this app, you can easily measure the current level of environmental noise.
This is a Smart Tools collection.
Simple operation and easy to use.
This app had calibrated many android devices with an actual sound level meter.
Most of time, it can get accurate data.
No problem, you use it as an useful tool in your life.
********************Features****************
-. Background measurements.
-. Show average, LAeq, min, max and peak dB
-. Clean and beautiful interface
-. High and Low alarm
-. dB(A), Low, High, Band pass filter.
-. Shows the filter curve.
-. References sound noise standard.
-. Brightness measurements. (lux)

The high decibel value will be harmful to your physical and mental health and hearing function.
You'd better avoid exposure in noisy environments.
To protect your and your family's health, detect the decibel value now!

References
0-30dB: Soft whisper
30dB: Quite library
40dB: Quiet room
50dB: Rain under
60dB: Normal speech
70dB: Vacuum cleaner
80dB: Heavy traffic
90dB: Sawing machine
100dB: Rocket launch