Ever wonder if your apartment is actually noisy, or if it just feels that way? I built Noise Recorder – Decibel Meter to answer that question for myself. It runs in the background, auto-records when things get loud, and shows you exactly when and how often noise events happen.
I got tired of second-guessing myself about ambient noise. Was that construction really all day, or just an hour? How often do footsteps from upstairs actually wake me up? I wanted data, not feelings. So I built a tool that monitors sound levels continuously, detects sudden changes automatically, and lets me review everything later with timestamps and decibel readings.
What it does
The app gives you a live decibel meter with a waveform chart, so you can see noise levels in real time. Tap once to start recording, and it handles everything else automatically.
- Auto recording with segment rotation — Records continuously in M4A format, splitting into manageable segments. Quiet segments below your threshold get auto-deleted to save space. The screen stays on during recording so you don’t miss anything.
- Automatic noise event detection — The app detects sudden spikes or sustained loud periods on its own. Each event shows peak dB, average dB, and duration. You can tag events as Footsteps, Thud, Construction, Water, Music/TV, Pet, or Other. Version 1.1.0 adds custom tags, so you can label anything specific to your environment.
- Filtering and review tools — New in this version: set a dB threshold to show only events above a certain level, or exclude specific tags you don’t care about (like sounds you made yourself). Each screen (Records, Stats, Export) remembers its own filter settings. Use the skip buttons to jump between segments quickly, with a “Part N/M” label showing your position.
- Statistics and analysis — View an hourly noise chart, see your quiet time vs. noisy time ratio, and count loud occurrences. You can now filter by weekday or weekend to spot patterns in your routine.
- Export and documentation — Export your filtered data to PDF or Excel. Attach photos for context (useful if you’re documenting a noise complaint). The export respects your dB threshold and excluded tags.
The app supports both English and Korean, with automatic dark mode. You can customize segment length, detection threshold, and sensitivity to match your environment.
Who it’s for
This is for anyone who needs to document their sound environment. Maybe you’re dealing with noisy neighbors and need evidence. Maybe you’re tracking construction noise near your home. Maybe you just want to understand your own daily noise exposure. The app treats your recordings as personal reference data, not professional measurements — it’s built for insight, not courtroom-level precision.
Version 1.1.0 fixes several bugs from the initial release, including a freeze issue with real-time monitoring and problems with custom tag saving. If you’ve been looking for a way to track noise patterns without babysitting a recording app, give this one a try.
Download on Google Play: Noise Recorder – Decibel Meter
Official page: reactiveworks.dev/apps/floor-noise-recorder
Update history: ahngo13.github.io
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