dB Sound Meter

Simple db Sound meter to measure environmental noises Main features: • It measures environmental noise level • Gauge for indicate current dB sound level • Line chart for monitoring SPL changing • Can calibrate the decibel values for each devices • dB Sound meter has fast response For calibration your device you have to find noiseless place at home (average ambient noise level is 30 dB ) and set value for correction in the calibration menu. Turn your smartphone in the real sound level meter ! NOTE: This sound level meter uses built-in microphone to measure ambient noise level, so the app is not as reliable as a professional noise meter, but it gives approximate values. The maximum values can be limited by the device (often limit is in a range 80 dB - 90 dB ). Very loud sounds may not be recognized. Some devices are equipped with AGC (Automatic Gain Control). This system causes additional sound pressure level measurement error. Levels of Noise In decibels (dB) : 140 dB - gun shots, fireworks 130 dB - jackhammers, percussion section at symphony 120 dB - jet planes taking off 110 dB - power saw, car horns 100 dB - school dance, boom box 90 dB - power tools 80 dB - Alarm clocks 70 dB - traffic, vacuums 60 dB - normal conversation, dishwasher 50 dB - moderate rainfall 40 dB - quiet residential area 30 dB - whisper 20 dB - leaves rusting 10 dB – breathing