Sound Pressure: Audio SPL

Real-time dB SPL meter — track ambient noise levels, capture min/max/average, chart over time, and export sessions for noise assessments.

Sound Pressure turns your iPhone into a real-time dB SPL meter. Using your device's microphone, it captures ambient noise levels in decibels — perfect for workplace safety checks, audio system tuning, music venue compliance, or simply finding the quietest spot in a coffee shop.

Watch the live readout, monitor min/max/average over time, and see the dB trend on a scrolling chart. Start a recording session to capture noise patterns, then export everything as CSV for review.

Key Features:

• Real-time dB SPL measurement via microphone
• Min, max, and rolling average tracking
• Live dB chart with scrolling history
• Session recording with timestamps
• CSV export for full sessions
• Minimum dB filter to ignore silence
• Sample rate display for transparency
• Clean, high-contrast dark interface

Perfect for HVAC technicians, audio engineers, OHS inspectors, music teachers, parents checking child noise exposure, or anyone curious about how loud their world is. Know your decibels — instantly.