Sound Meter: Decibel dB Meter

How loud is it right now? Sound Meter turns your phone's microphone into a real-time decibel (dB) meter, so you can check the noise level anywhere in seconds. Measurement starts the moment you open the app, and the minimum, maximum and average noise levels are recorded automatically. ■ Features • Real-time noise measurement in decibels (dB) • Automatic min / max / average tracking • Clear, easy-to-read gauge display • Starts measuring instantly on launch • Lightweight and fast ■ Great for • Neighbour and apartment noise complaints • Offices, meeting rooms and co-working spaces • Libraries, classrooms and study rooms • Cafés, bars and restaurants • Construction sites and road traffic • Gyms, concerts and other loud environments • Checking whether a room is quiet enough to sleep or record in ■ Decibel (dB) reference • 30 dB — quiet library, whisper • 40 dB — quiet residential area, refrigerator hum • 50 dB — quiet office • 60 dB — normal conversation • 70 dB — busy street, vacuum cleaner • 80 dB — subway car, alarm clock • 85 dB — hearing damage risk begins with prolonged exposure • 100 dB — construction site, motorcycle • 120 dB — jet takeoff, threshold of pain ■ Please note • Readings vary with your device's microphone and surroundings. • This app is for reference only and is not a replacement for a certified professional sound level meter. Use an accredited service if you need legally valid measurements. • Microphone permission is required. Audio input is used only to calculate loudness and is never saved as a recording. • The app is free and supported by ads. An internet connection is used to serve those ads.