CLAPRT
Transform your iPhone into a professional acoustic measurement system. Simply clap your hands to measure room reverberation time, or use continuous monitoring for comprehensive sound level analysis.
Professional Acoustic Measurement
Whether you are an audio engineer setting up a recording studio, an acoustician analyzing room characteristics, or a safety professional monitoring workplace noise exposure, CLAPRT delivers the precision and features you need.
Key Features
RT60 Reverberation Analysis
Measure room decay time with a simple hand clap. Analyze RT60 across multiple frequency bands (125Hz to 4kHz) using T20 and T30 methods conforming to ISO 3382 standards.
Sound Level Metering
Accurate SPL measurements with A, C, and Z weighting. View real-time levels, Leq, max, min, and peak values. Pre-calibrated for reliable measurements.
Noise Dose & TWA Tracking
Monitor occupational noise exposure with OSHA (90 dBA, 5 dB) and NIOSH (85 dBA, 3 dB) standards. Essential for workplace safety compliance.
Spectrum Analysis
Visualize audio frequencies with the built-in FFT analyzer. View octave and third-octave bands to identify room modes and fine-tune acoustic treatments.
Comprehensive Statistics
Track measurement history with LAeq, LCeq, LZeq, Lmax, Lmin, and Lpeak. Export data in CSV format for analysis or documentation.
iCloud Sync
Keep your measurement history synchronized across all your devices. Access your data anywhere with seamless iCloud integration.
Frequency Weighting Options
Choose the right weighting curve to match your specific measurement requirements.
Standard for measuring environmental and occupational noise. Matches human hearing sensitivity and is required for OSHA/NIOSH compliance.
Ideal for low-frequency noise and peak sound levels. Commonly used in entertainment venues and for hearing damage risk assessment.
Unweighted flat measurement providing true acoustic energy across all frequencies. Essential for acoustic research and audio production.
Occupational Noise Compliance
Track Time-Weighted Average (TWA) and cumulative noise dose according to both OSHA and NIOSH standards. Essential for workplace safety compliance and hearing conservation programs.
90 dBA, 5 dB exchange rate
Occupational Safety and Health Administration standard for workplace noise exposure limits.
85 dBA, 3 dB exchange rate
National Institute for Occupational Safety and Health recommended exposure limit.
Additional Features
iCloud Sync
Keep your measurement history synchronized across all your devices with seamless iCloud integration.
External Mic Support
Calibration support for external microphones for professional applications requiring traceable accuracy.
Flexible Duration
Multiple measurement durations from 15 seconds to continuous monitoring for any measurement scenario.
InstaDecibel
Overlay dB readings on photos for documentation and professional reporting purposes.
Data Export
Export measurement data in CSV format for further analysis or compliance documentation.
Theme Support
Dark and light mode support for comfortable viewing in any lighting condition.
Complete Feature List
Use Cases
Accuracy and Calibration
CLAPRT is pre-calibrated for iPhone microphones to provide reliable measurements for screening purposes. For professional applications requiring traceable accuracy, external calibrated microphones are supported.
Note: While CLAPRT provides highly accurate measurements for its intended use cases, smartphone-based sound level meters have not been certified to meet national or international standards for Type 1 or Type 2 sound level meters. For official compliance measurements, use certified equipment.
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 Acoustic Measurement in Your Pocket
Download CLAPRT today and bring professional acoustic measurement capabilities wherever you go.
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