Noise Meter - Decibel, Record

Measure it. Record it. Put it on paper. Saying it was loud is easy to dismiss. A document that says how many decibels, at what time, for how long, is not. Noise Meter measures everyday noise in decibels, records it, and turns every session into a one page measurement report you can hand in. [While you measure] - A live waveform and gauge show how loud it is right now. - Peak level (Lmax) and 1 minute and 5 minute equivalent levels are calculated as you record. - Day limits (06:00 to 22:00) and night limits (22:00 to 06:00) are applied automatically. Night is 5dB stricter. - Tap a source button the moment you hear it (footsteps, dragged furniture, a dropped object) and it is marked at that exact point. - Recording keeps running with the screen off. [Calibration that fits your phone] Microphone sensitivity differs by device. One 10 second calibration gets your numbers right, and the offset used is printed on the report so whoever reads it knows the conditions. [One page that holds up] - Time, day or night band, place and device in the overview. - Measured values next to the limits, with a clear over or within verdict. - A SHA-256 hash of the audio file, so you can show the file was not altered. - Export to PDF and the share sheet opens. Mail it, print it or save it. [Patterns that appear over time] - A weekday by hour heatmap shows when it keeps happening. - Weekly trend, over limit ratio and source breakdown at a glance. - Put two recordings side by side and see exactly what changed. - Filter for night only or over limit only. [What to do next] Step by step guidance on who to tell first, what to prepare and where to file. [Your recordings stay on your phone] No sign up, no login. Audio and measurements are stored on the device only and are never sent to a server. Check how much is stored and wipe all of it in one tap. [Also] Korean, English, Japanese, French and Spanish. Light and dark themes. Screen reader labels on every screen. [Please note] Values come from the built in microphone and may differ from a certified sound level meter (IEC 61672). For official measurements use your local authority noise service and treat these records as supporting evidence. Recording a conversation between other people that you are not part of may be illegal where you live. You are responsible for what you record and how you use it.