Sound Meter - Audio Analyzer

Noise Log, dB & Hum Finder

Only for iPhone

Free · In‑App Purchases

iPhone

New: Noise Log. Monitor overnight, label each event (music, footsteps, dog…) and share a complete PDF log with your landlord or HOA. Live on your Lock Screen. Turn your iPhone into a smart sound measurement tool: measure noise, find frequencies, compare changes and create reports. Most sound meters just show a number. Sound Meter tells you what it means and what to do next. MEASURE • Live dB with A, C and Z weighting and Fast, Slow or Impulse response • Average (Leq), minimum, maximum and peak, with a 60-second graph • Plain answers: "43 dBA · Quiet, like a library" • Guided modes for Noise, Machine, Speaker and Room set everything up for you FIND • Spectrum analyzer with the dominant frequency and likely sources ("126 Hz · Low hum — check fans, compressors, fridges") • Tap to pick any frequency, pinch to zoom, freeze and peak hold • Find mode: lock a frequency, walk around and follow "Getting louder" to the source COMPARE • Save sessions and measure Before / After from the same spot • See exactly what changed: "Noise reduced −8.5 dBA average, largest change at 125 Hz" • Great for HVAC work, soundproofing, speakers, fans and machines REPORT • PDF measurement report with levels, graph, spectrum, events, device, microphone and calibration • CSV data and PNG image export MONITOR • Set a threshold and get notified when noise stays above it • Event log with times and maximum levels, even while the phone is locked NUMBERS YOU CAN TRUST • Calibration wizard: match a reference meter or acoustic calibrator in a minute • Measurement Quality shows why a reading is Good, Fair or Poor — clipping, noise floor, microphone route, calibration • USB measurement microphones and wired headsets supported ALSO • RTA in 1/1 and 1/3 octave bands • Tone generator: sine, pink noise, white noise and sweeps PRIVATE BY DESIGN Audio is analyzed live on your iPhone. It is never recorded, stored or sent anywhere. No ads, no account, no tracking. NOISE LOG FOR COMPLAINTS • Monitor overnight (until 7:00) and log every time noise stays above your threshold • Label each event — music, voices, footsteps, dog, traffic — and add a note • See night-time events (22:00–07:00), the longest and loudest event, and how much of the night was actually measured • Share a complete PDF noise log or CSV with your landlord, HOA or council LOCK SCREEN & DYNAMIC ISLAND • While a session or monitor runs, see the level, average and event count without unlocking — and stop it with one tap READY FOR IPHONE DUO • Two-column layouts on the large inner display PRO — ONE-TIME PURCHASE Find mode, Before / After, noise monitor, PDF and CSV export, 1/3-octave RTA, unlimited sessions, calibration for every microphone and the full generator. Pay once, no subscription. Sound Meter is a measurement reference, not a certified sound level meter (IEC 61672). For legal or occupational compliance, use a certified instrument. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bmit-mob.web.app/sound-meter/privacy-policy.html

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• Noise Log: monitor until 7:00, label each event with what it was and a note, and export a complete PDF or CSV log with night-time events • Lock Screen & Dynamic Island: level, average and events at a glance, stop with one tap • iPhone Duo: two-column layouts on the inner display • More reliable: the meter restarts by itself after a phone call or Siri, and any gap is shown in the log • Fixes for small screens, large text and right-to-left languages

Version 1.0.1

The developer, Nguyen SonTung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Nguyen SonTung
    Size
    5.2 MB
    Category
    Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 30 more
    • English, Arabic, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Persian, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © BMIT MOB, LLC
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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