Decibel Meter: dB Sound Level

Transform your iPhone into a professional-grade sound level meter with Decibel Meter: dB Sound Level. Whether you're monitoring workplace noise exposure, protecting your hearing, ensuring baby safety, or conducting acoustic analysis, this app delivers accurate, real-time decibel measurements with industry-standard compliance.
PROFESSIONAL-GRADE MEASUREMENT
Measure sound levels with precision using multiple frequency weightings (dBA, dBC, dBZ) and time response settings. Our app complies with NIOSH and OSHA standards, making it perfect for occupational health and safety professionals, audiologists, and anyone who needs reliable noise monitoring.
KEY FEATURES
• Multiple Measurement Modes
- dBA: A-weighted, matches human hearing sensitivity
- dBC: C-weighted, includes low frequencies
- dBZ: Z-weighted, flat/unweighted response
- NIOSH Mode: 85 dB limit with 3 dB exchange rate
- OSHA Mode: 90 dB limit with 5 dB exchange rate
- Baby Safety Mode: 60 dB limit, safe for infants
• Real-Time Monitoring
- Live decibel readings with circular gauge display
- Min, Max, and Average statistics
- Color-coded visual feedback
- Reference labels for common sound levels
• Advanced Frequency Analysis
- Frequency spectrum analyzer with bar and line charts
- Octave band analysis (1/1, 1/2, 1/3 octave bands)
- Visual representation of sound across frequency ranges
- Expandable full-screen chart view
• Time Response Settings
- Fast (125ms): Quick response to changes
- Slow (1000ms): Smooth, averaged response
- Impulse (35ms): Captures brief sounds
- 3s (3000ms): Very smooth, long-term average
• Exposure Tracking (Dosimeter)
- Track noise exposure over time
- Calculate dose percentage
- Projected 8-hour exposure
- Time to limit warnings
- NIOSH and OSHA compliance
• Audio Recording & Analysis
- Record audio with synchronized decibel data
- Organize recordings with timestamps
- Playback recordings with visual analysis
- Export detailed PDF reports (Premium)
• Customizable Ala…