Sound Meter (com.geogreenapps.soundmeter) on Google Play
*** We welcome your suggestions and comments.Please send us email with your problems.So we can help you and possibly update the app version quickly.***The sound level meter.Every smart phone, there may be an error of the measured value.The noise of their surroundings, you can measure how much.Android 80 ~ 100db of sound to the maximum value of the equipment may vary.You're starting to sound measurement can check the maximum and minimum values.