Decibel Meter & dB Sound Level

Measure noise in real time with professional A, C and Z weighting. Track min, average, max and peak levels, watch your noise dose and save every measurement.

Know Exactly How Loud It Is with Decibel Meter & dB Sound Level.

Ever wondered whether your workshop is damaging your hearing, if the neighbours really are out of line, or how loud that concert actually got? Do you wish you had a reliable sound level meter in your pocket instead of guessing? Whether you are a musician, a site foreman, a teacher, a parent or simply someone who values quiet, Decibel Meter is your go-to solution for fast, clear noise measurement.

Powered by real-time audio analysis and an interface you can read at a glance, Decibel Meter transforms your iOS device into a capable sound level meter. Point your phone at the noise and see exactly how many decibels you are dealing with - no setup, no account, no internet connection needed.

Key Features

Real-Time Decibel Readings A large, instantly readable dB value backed by a live graph of the last two minutes, so you see not just how loud it is right now, but how it has been changing. (Premium subscription required.)

Professional A, C and Z Frequency Weighting Switch between the IEC 61672 weighting curves the professionals use. A-weighting matches human hearing and drives most noise limits, C keeps the bass for music and machinery, Z is completely flat. Fast (125 ms) and Slow (1 s) response speeds included. (Premium subscription required.)

Min, Average, Max and Peak Statistics Every session tracks the quietest and loudest moments, the true energy average (Leq) and the unsmoothed peak, so you can describe any environment with real numbers instead of opinions. (Premium subscription required.)

Noise Dose Tracking See your exposure as a percentage of the recommended daily limit, based on the NIOSH standard of 85 dB over 8 hours with a 3 dB exchange rate. Know when it is time to walk away. (Premium subscription required.)

Camera Mode with Live dB Overlay Put the decibel readout on top of what your camera sees and record it as a video clip - perfect for showing what was loud, not just saying it was. (Premium subscription required.)

Saved Records with Location Tags Name each measurement, tag it with the place it was taken, and open it again later with the full graph and statistics intact. (Premium subscription required.)

Manual Calibration Match the app to a reference meter once, and the correction is applied to every measurement from then on. (Premium subscription required.)

Why Choose Decibel Meter?

Simple by Default, Deep on Demand Start with just the number. Switch to the detailed view when you want the frequency spectrum and the dominant frequency to identify what is actually making the noise.

A Reference Table That Makes Sense Seven decibel bands with everyday examples - from a whisper to a jet taking off - colour coded from safe to dangerous, so any reading means something immediately.

Works Entirely Offline Measuring, saving and reviewing all happen on your device. No account, no sign-up, no measurements leaving your phone.

Premium Subscription Required To access the measurement features - live readings, A/C/Z weighting, session statistics, noise dose, camera mode, saved records and calibration - a premium subscription is required. Choose the plan that fits you, whether you need it for a single project or every working day.

Get Started Today! Stop guessing how loud it is. Decibel Meter gives you a clear number, professional weighting curves and a record you can come back to. Transform your iOS device into a sound level meter you will actually use.

Download Decibel Meter & dB Sound Level now and know exactly how loud it is.

Please note: readings are estimates produced with the microphone in your device and are not a substitute for a certified Class 1 or Class 2 sound level meter.

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Take control of the noise around you - get Decibel Meter today and measure with confidence!