Sound Level Decibel dB Meter

Sound Level Decibel dB Noise Meter (SPL) smart tools app is shows a decibel values by measure the environmental noise, displays measured dB values in various forms. You can experience tidy graphic design with high frame by this smart sound meter app.
This app will use the phone microphone to measure environmental noise decibels (dB) and show a value for reference.
With this app, you can easily measure the current level of environmental noise. Simple operation and easy to use.

Features:
- Indicates decibel by gauge
- Display the current noise reference
- Display min /avg /max decibel values
- Display decibel by graph
- Can calibrate the decibel for each devices

Levels of Noise In decibels (dB):
140 dB - Gun shots, fireworks
130 dB - Jackhammers, Ambulance
120 dB - Jet planes taking off
110 dB - Concerts, Car horns
100 dB - Snowmobiles
90 dB - Power tools
80 dB - Alarm clocks
70 dB - Traffic
60 dB - Normal conversation
50 dB - Moderate rainfall
40 dB - Quiet library
30 dB - Whisper
20 dB - Leaves rusting
10 dB - Breathing

Notes
Microphones in most android devices are aligned to human voice. The maximum values are limited by the device. Very loud sounds (over ~90 dB) may not be recognized in most device. So please use it as just an auxiliary tools. If you need more accurate dB values, we recommend a real sound level meter for that.

*This is a free app, so is has some ads on it.