Pulse dB — Sound Level Meter

Pulse dB is a sound level meter built around one idea: show the dB, accurately, without anything in the way. Open the app and you see your environment in real time — instantaneous reading, peak hold, and the running 60-second Leq. That's it. No banner ads. No popups. No subscription wall blocking the meter you came to use. ──────────── WHAT IT MEASURES - Real-time A-weighted sound level (dBA), the standard used by occupational health regulators worldwide. - Optional C-weighting for low-frequency-heavy environments like concerts, machinery rooms, and HVAC measurement. - Peak hold (1 second) — the loudest moment in the last second. - Leq (60 seconds) — the equivalent continuous level over the last minute, the metric used in noise studies. - Min, average, and maximum readings across your session. - A live waveform showing the last 60 seconds. ──────────── CALIBRATION Phone microphones vary by model. Pulse dB lets you set a calibration offset (±5 dB) to match a known reference — a calibrated meter, a sound level reference card, or a verified reference tone. The offset is saved per device and applied to every reading. ──────────── SAFETY ZONES (NIOSH) Color zones on the gauge mark the thresholds recommended by the U.S. National Institute for Occupational Safety and Health: - Below 70 dB — generally safe - 70 to 85 dB — caution; long exposure can cause damage - Above 85 dB — high; hearing protection recommended ──────────── PRIVACY Pulse dB requests one permission: microphone access. Nothing else. No location. No contacts. No analytics SDKs phoning home. Your reading history stays in local storage on your device — it is never uploaded, never synced, never shared. The microphone is used only to compute the dB level; no audio is recorded, stored, or transmitted. ──────────── DESIGN Built natively for Android with Material 3. Dynamic color (Material You) is supported on Android 12 and above — Pulse dB will automatically adopt your system accent color. Themed icons (Android 13+) tint to your wallpaper. ──────────── WHO IT'S FOR - People worried about noise exposure at work, in their neighborhood, or at concerts. - Audio enthusiasts checking room acoustics or speaker setups. - Teachers running classroom experiments. - Parents who want a simple, honest tool to understand the sound around their family. - Anyone tired of decibel meters that bury the reading under three banners. ──────────── WHAT IT DOES NOT DO Pulse dB is not a substitute for a calibrated Class 1 or Class 2 sound level meter for legal, regulatory, or occupational compliance work. Phone microphones have hardware limits — most are tuned for human voice and may underread very loud sounds (above ~95 dB). Pulse dB will tell you what your phone hears as accurately as your phone allows, but professional measurement requires professional equipment. ──────────── Have feedback or a feature request? Reply to any review or contact us through the developer page. Every message is read by a human.