Decibel Meter Pro: Sound Level

Turn your iPhone into a professional sound level meter. Measure noise in dB, dBA and dBC, see every frequency and know how much noise your ears can safely take. ANALYZE SOUND LIKE A PRO • Real-time spectrum analyzer with the dominant frequency • Live spectrogram: watch sound change second by second • 1/1 and 1/3 octave band analysis • A, C and Z weighting, Fast and Slow response • Leq, LCpeak and peak hold PROTECT YOUR HEARING • Noise dose against NIOSH and OSHA limits: how much of today's safe exposure you have used and how long is left • Loud-sound alert with vibration at your own limit RECORD, PROVE, SHARE • Save the audio with every measurement and play it back any time • L10, L50 and L90 statistical levels • Export CSV data and one-page PDF reports, ideal for noise complaints • Location and map for each measurement • Save to Apple Health as environmental sound levels PREMIUM (ONE-TIME PURCHASE) • No ads on any screen • Keeps recording with the screen locked • Noise log: every loud moment with time and audio • Live dB on the Lock Screen, Dynamic Island and widgets • A notification when it gets too loud • iCloud sync across your devices EASY TO USE • Four meter styles: LED, Modern, Classic and Spectrum • Calibration to match a reference meter • Light and dark mode, 50 languages PERFECT FOR Noisy neighbors, concerts, workplaces, classrooms, traffic, home studios, and checking how quiet your bedroom really is. GOOD TO KNOW A phone microphone is not a certified instrument, so readings are an estimate and can vary between devices. Use calibration for the best accuracy.