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.