Sound Meter dB

Decibel Meter & Noise Detector

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

New: a one-minute hearing test, Night mode that logs every noise while you sleep, and a noise diary PDF for your landlord or council. Sound Meter dB turns your phone into a decibel meter and noise detector: a live dB reading on a color-coded dial, from quiet teal to dangerous red, with a history graph, safe-exposure guidance, a night-long noise log, a hearing test and a frequency analyzer. Open it and it's already measuring: the party next door, the office air conditioning, the restaurant that "isn't that loud". Ten readings a second, time-weighted like a real sound level meter, and your music or podcast keeps playing. NEW: NIGHT MODE Leave the phone by the bed, plugged in, and go to sleep. Night mode learns how quiet your room is, then logs every noise above it: when, how long, how loud and what kind of sound. In the morning, a report: the whole night on one chart, every noise marked, the loudest called out, your longest quiet stretch. Made for noisy neighbors, traffic, a barking dog, or whatever wakes you at 3 AM. NEW: HOW HIGH CAN YOU HEAR? The highest pitch you can hear drops with age. A one-minute hearing test climbs through tones up to 20,000 Hz and shows which age group your ears match. Share it and see how your friends do. For fun, not a medical test. NEW: YOUR DAILY NOISE DOSE How much of today's safe sound allowance have you used? The meter adds up every measurement of the day against the NIOSH limit (85 dBA for 8 hours) and shows it as one percentage. NEW: FREQUENCY ANALYZER (PRO) Third-octave bands from 50 Hz to 16 kHz and the dominant tone, live, with its musical note. A guide shows what usually makes each part of the spectrum (rumble, hum, whine, hiss), and the analyzer flags electrical hum. Find the source, not just the level. NEW: PDF REPORTS AND A NOISE DIARY (PRO) Turn any session into a clean PDF: the chart, the average and the peaks, every noise event, the measurement settings. Or put weeks of nights into one noise diary, the way a landlord, an HOA or the council asks for it: every noise with its date, time, level and type, and room for your notes. MEASURES LIKE A REAL METER A-weighted readings (dBA), Fast or Slow response, and Leq, the energy average: the same maths as a sound level meter. The dial holds the session peak and turns red past 100 dB. Have a reference meter? Calibrate against it in Settings. EVERY READING, IN PLAIN WORDS 40 dB is a quiet library, 60 a conversation, 75 a vacuum cleaner, 95 power tools, 110 a rock concert. Following the NIOSH guideline, the app shows how long the current level is safe for and counts the time over 85 dB. EVERY SESSION, SAVED Measurements stay on your device with their timeline and loudest moments. Share one as an image, export it as CSV, or make it a PDF report. FOCUS MODE The reading as big as the screen, and the whole screen turns red when the room stays above your limit. Made for classrooms, workshops and venues. PRIVATE, AND WORKS OFFLINE Sound is analyzed on your device, as numbers. No recording is kept or uploaded, not even in Night mode. No account, no connection needed. THE HONEST PART Phone microphones are built for voice, not metrology, and every model hears a little differently. Readings are good estimates for awareness and comparisons, not a substitute for a certified Class 1 or Class 2 instrument. GOOD FOR - Documenting noisy neighbors, traffic and night-time noise - Checking noise at home, at work, in a classroom or workshop - Concerts and events: knowing when to give your ears a break - Finding the hum, whine or rumble in a room - Sleep and study rooms, nurseries and baby rooms FREE, WITH AN OPTIONAL PRO Sound Meter dB is free, supported by a small banner and an occasional ad when the app opens. Sound Meter dB Pro is a one-time purchase, not a subscription: it removes the ads and unlocks the frequency analyzer, the full event list in night reports, PDF reports and the noise diary. The meter, Night mode, the hearing test, history, sharing and everything else stay free for everyone. Privacy policy: https://noise.chinesepowered.com/privacy.html

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

The biggest update yet. • Night mode: put your phone by the bed and wake up to a report of every noise in the night: when, how long, how loud and what kind of sound, plus your longest quiet stretch. • Hearing test: how high can you still hear? Find out in a minute and share your result. • Noise diary (Pro): weeks of nights in one PDF, the way landlords and councils ask for it. • Daily noise dose: how much of today's safe sound allowance you've used, across every measurement. • Frequency analyzer (Pro): live third-octave bands and the dominant tone, with a guide to what makes each sound. • PDF noise reports (Pro) for any session. • Sound Meter dB Pro: one purchase, no subscription. No ads, the full analyzer, complete night reports, PDFs and the noise diary. • Your music keeps playing while you measure, and after a call the meter picks up again by itself. • More accurate readings. If you set a calibration offset, check it once against your reference. • Now also in Japanese, Korean, Chinese, Russian, Turkish, Dutch, Polish and Indonesian.

Version 1.0.4

In-App Purchases

The developer, Nelson Lai, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers

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
Nelson Lai
Size
58.8 MB
Category
Utilities
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • iPad
    Requires iPadOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 14 more
  • English, Dutch, French, German, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish
Age Rating
4+
In-App Purchases
Yes
Copyright
© Nelson Lai
  • Developer Website
  • Privacy Policy

    • More by Nelson Lai

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