Sono Decibel Noise Meter

Sono gives you a professional decibel meter in your pocket. Measure sound levels accurately with an A-weighted filter that matches how your ears actually perceive noise. SEE SOUND IN REAL TIME Watch noise levels update live with a smooth animated gauge and streaming chart. The display responds instantly to loud sounds while staying readable — no jumpy numbers. RECORD & ANALYZE Tap Record to capture a measurement session. Review detailed stats including min, average, max, and a full level distribution breakdown. Export your data as CSV or JSON. MONITOR FROM ANYWHERE Enable Live Activity to track decibel levels right from your Lock Screen or Dynamic Island — no need to keep the app open. PROTECT YOUR HEARING Set a custom noise threshold and get notified when sound levels become dangerous. Sono also writes noise exposure data to Apple Health for long-term hearing tracking. BACKGROUND LISTENING Keep monitoring even when you switch apps. Perfect for tracking noise levels during meetings, concerts, or overnight. KEY FEATURES • A-weighted filter (IEC 61672 standard) • Real-time dB gauge and live chart • Recording with min/avg/max stats • CSV and JSON export • Live Activity and Dynamic Island • Customizable noise threshold alerts • Apple Health integration • Background listening mode • Device calibration offset • Works on iPhone and iPad