SoundMeter: Decibel dB
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Description
Measure sound levels with professional-grade accuracy. SoundMeter turns your iPhone into a powerful decibel meter with real-time dB readings, spectrum analysis, and session recording.
REAL-TIME SOUND MEASUREMENT
Instant decibel (dB) readings with A, C, and Z frequency weighting
Fast and slow time weighting for different measurement needs
Live min, max, average, and peak level tracking
Color-coded safety categories based on NIOSH exposure guidelines
VISUAL SOUND ANALYSIS
Beautiful arc gauge with smooth animated needle
Scrolling timeline graph showing sound levels over time
Color gradient from safe green through warning orange to danger red
Sound level reference chart comparing to everyday sounds
SESSION RECORDING & HISTORY
Record measurement sessions with one tap
Review past recordings with full statistics
Timeline graph replay of recorded sessions
Organized history with date, duration, and average level
PRO FEATURES (One-Time Purchase)
Spectrum Analyzer: 32-band FFT frequency visualization
Unlimited session history (free tier: 3 recordings)
CSV data export for professional reports
Calibration profiles for different environments
Threshold alerts with haptic feedback
SOUND REFERENCE GUIDE
Compare your readings to common sounds (whisper to jet engine)
NIOSH safe exposure time recommendations
Understand noise risk levels for hearing protection
PERFECT FOR
Workplace noise assessment and OSHA compliance
Environmental noise monitoring
Music and event sound level checking
Hearing health awareness
Classroom and office noise management
Construction site safety monitoring
Built with professional audio engineering principles including IEC 61672 frequency weighting standards. While not a replacement for calibrated professional equipment, SoundMeter provides reliable relative measurements for everyday noise awareness and safety.