Sound Noise Meter+ dB SPL

Pro dBA SPL meter + OSHA/NIOSH 8-hr dose tracker + Quiet Room 1-tap calibration. Live gauge, history chart, A/C/Z weighting. Free — no paywall.

Sound Noise Meter+ is a professional-grade sound level meter with built-in OSHA/NIOSH 8-hour noise dose tracking, A/C/Z weighting, and one-tap Quiet Room calibration. No hardware required — just your iPhone.

Using your device's built-in microphone, the app captures audio and calculates sound pressure levels with professional accuracy. The beautifully designed radial gauge displays readings from 0 to 120 dB, with color-coded zones (green for safe, yellow for moderate, red for hazardous) so you can instantly assess your noise environment.

Key Features: • Real-time decibel measurement (0-120 dB SPL) • Animated radial gauge with color-coded noise levels • Live sound waveform chart with continuous monitoring • Min, Average, and Max dB tracking per session • Calibration adjustment (±20 dB) for precision tuning • 12 noise level descriptions with reference examples • One-tap recording with pause and reset controls • Dark theme interface optimized for any environment

Perfect For: • Checking workplace noise levels for OSHA compliance • Monitoring neighborhood and traffic noise • Measuring music venue and concert sound levels • Assessing classroom or office noise environments • Testing speaker and audio equipment output • Environmental noise surveys and studies

The app features an intuitive dark interface with a professional radial gauge that animates smoothly as sound levels change. Track minimum, average, and maximum readings to understand noise patterns over time. The built-in calibration tool lets you fine-tune measurements for your specific device.

Your privacy matters — all audio processing happens locally on your device. No recordings are stored or transmitted. Sound Noise Meter respects your privacy completely.