SPL Meter
Transform your iPhone into a professional-grade sound level meter. Whether you are a sound engineer, health and safety professional, musician, or simply concerned about noise exposure, SPL Meter provides the accurate measurements you need.
ANSI Type 1 Accuracy
Advanced DSP algorithms deliver precise sound pressure level readings compliant with ANSI Type 1 standards for professional measurements.
A/C/Z Weighting
Choose A-weighting for occupational noise, C-weighting for low-frequency and peak levels, or Z-weighting for flat acoustic research.
Spectrum Analyzer
Visualize sound energy across 31 frequency bands with the built-in 1/3 octave spectrum analyzer to identify problematic frequencies.
Noise Dose Monitoring
Protect your hearing with NIOSH-based exposure tracking. Color-coded alerts warn you of safe, caution, and dangerous noise levels.
Precision Calibration
Device-specific profiles for every iPhone and iPad model, plus manual calibration support for external measurement microphones.
RT60 Measurement
Measure room acoustics with built-in RT60 reverberation analysis. Evaluate acoustic treatment and optimize studio or venue sound quality.
Frequency Weighting Options
Choose the right weighting curve to match your specific measurement requirements.
The standard for measuring environmental and occupational noise. Matches human hearing sensitivity and is required for OSHA and NIOSH compliance measurements.
Ideal for measuring low-frequency noise and peak sound levels. Commonly used in entertainment venues and for assessing hearing damage risk.
Unweighted measurement providing the true acoustic energy across all frequencies. Essential for acoustic research and audio production.
Precision Measurement Tools
Fast and Slow Response
Toggle between 125ms fast response for capturing transient sounds and 1-second slow response for steady-state noise measurement.
Nine Measurement Ranges
Select from ranges spanning 30dB to 130dB to optimize display resolution for your environment, from quiet studios to loud industrial settings.
Peak Hold and Statistics
Track minimum, maximum, peak, and Leq (equivalent continuous sound level) values throughout your measurement session.
Real-Time Spectrum Analyzer
Visualize sound energy distribution across 31 frequency bands with the built-in 1/3 octave spectrum analyzer.
Noise Exposure Monitoring
Protect your hearing with integrated noise dose calculation based on NIOSH recommended exposure limits. The app tracks your cumulative noise exposure and alerts you to potentially harmful sound levels.
Below 70 dBA
No hearing damage risk
70-85 dBA
Prolonged exposure may cause damage
Above 85 dBA
Hearing protection recommended
Session Recording & Export
Record measurement sessions and review your data with detailed graphs showing SPL variations over time. Export your measurements as CSV or JSON files for further analysis, reporting, or compliance documentation.
RT60 Reverberation Measurement
Measure room acoustics with the built-in RT60 measurement tool. Analyze decay time to evaluate acoustic treatment effectiveness, optimize studio acoustics, or assess venue sound quality.
Key Features
Perfect For
Privacy Focused
All audio processing occurs locally on your device. No recordings are transmitted or stored externally. Your measurement data remains private and under your control.
Professional Sound Measurement in Your Pocket
Download SPL Meter today and get professional sound measurement capabilities wherever you go.
Download Now