Decibel - Sound Meter Pro

# Decibel Meter Pro: AI Sound

**Decibel Meter Pro: AI Sound** is an all-in-one acoustic engineering and noise measurement suite. Engineered for sound technicians, workplace safety inspectors, environmental researchers, acoustic enthusiasts, and everyday users, this app transforms your device into a certified-grade sound level meter (SPL), occupational noise dosimeter, AI sound classifier, camera noise evidence recorder, and precision tone generator.

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### Precision Decibel Meter & SPL Analyzer
Measure environmental sound pressure levels (SPL) in real time with high accuracy:
- **Instantaneous Sound Pressure**: Real-time dB readings with an ultra-responsive radial gauge (0 to 120+ dB).
- **Acoustic Readouts**: Instant, Minimum (Min), Maximum (Max), and Average (Avg) decibel tracking.
- **Live Waveform Chart**: Track sound level variations over time with dynamic scrolling waveform graphs.
- **Hardware Calibration**: Adjust microphone sensitivity with custom ±dB calibration offsets.
- **Reference Scale**: Compare measurements against real-world references (30 dB to 140 dB).

### Occupational Noise Dosimeter (OSHA & NIOSH)
Protect hearing and maintain workplace compliance with standard dosimeter monitoring:
- **Standards Presets**: Switch between **NIOSH REL** (85 dB / 3 dB), **OSHA HC** (90 dB / 5 dB), and **OSHA PEL**.
- **Real-Time & Projected Dose %**: Monitor live noise dose accumulation and projected 8-hour daily exposure.
- **TWA & Leq Metrics**: Calculate accurate Time-Weighted Average (TWA) and Equivalent Continuous Sound (Leq).
- **Hearing Risk Alerts**: Real-time color-coded safety guidance (Safe, Action Level, Hazardous).
- **Session History**: Save, review, and manage completed dosimeter sessions with exposure data.

### AI Sound Recognition & Classifier
Powered by on-device Edge AI machine learning (TensorFlow Lite / YAMNet):
- **Real-Time Sound Recognition**: Identifies speech, sirens, alarms, dogs, machinery, music, and nature.
- **Confidence Scoring**: Displays real-time detection probability percentages for every sound event.
- **Event Timeline**: Logs detected environmental sounds chronologically with exact timestamps.
- **100% On-Device Privacy**: All neural network processing runs locally—zero audio is sent to the cloud.

### Camera Sound Overlay & Visual Evidence
Document noise violations, workplace audits, and neighborhood sound levels with photo evidence:
- **Live Decibel HUD**: Real-time dB, Peak dB, Min/Max/Avg, and timestamps overlaid on viewfinder.
- **Watermarked Capture**: Save calibrated photo evidence with embedded sound stats to gallery.
- **Dual Camera**: Switch seamlessly between front and rear cameras for handheld and site audits.

### Audio Frequency Generator (20 Hz – 20 kHz)
Generate pure sine wave frequencies across the entire audible spectrum:
- **Full Spectrum Range**: Smoothly sweep from 20 Hz sub-bass to 20,000 Hz treble.
- **Gesture Controls**: Adjust frequencies with vertical drag gestures and quick presets (Low, Mid, High).
- **Acoustic Testing**: Perfect for speaker testing, subwoofer tuning, room acoustics, and tinnitus relief.

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### Privacy & Battery Efficiency
- **Zero Cloud Recording**: Audio is processed in memory only; never recorded or shared.
- **Optimized Performance**: Native audio processing with minimal battery drain.
- **Adaptive Themes**: Clean Light & Dark modes for high contrast in all lighting.


Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/