Decibel Meter – Noise Dose

Decibel Meter turns your iPhone into a sound level meter — and goes one step further: it tells you when noise starts harming your hearing. MEASURE • Real-time sound level with smooth gauge, Leq, peak and min/avg/max readings • dB(A), dB(C) and dB(Z) frequency weighting with standard Fast/Slow/Impulse response — readings comparable to dedicated SPL meters • Live level curve with a tap-to-enlarge view and the 85 dB NIOSH line • Fullscreen big-display mode — read the level from across the room • Auto-stop timer for fixed-duration measurements (1–60 min) • Reference chart: compare your surroundings to everyday sounds • Works fully offline, instant start ANALYZE (PRO) • Real-time spectrum analyzer: 31 third-octave bands with peak hold • Waterfall spectrogram — see how frequencies change over time • Dominant frequency readout with musical note — see what makes the noise • L10/L50/L90…