Professional Sound Level Measurement for iOS
Accurate decibel readings with industry-standard calculations
Download on App Store. Search for "John Xu" to downloadThis app does NOT collect any user data. User data is saved in your device only. This provides security in the AI Age. The app requires microphone access to measure sound/noise levels - audio is processed real-time and is never recorded or stored.
Get instant, accurate sound level measurements with a beautiful, easy-to-read gauge display. Track current and peak decibel levels in real-time.
Supports OSHA, NIOSH, and EU standards with A, C, and Z weighting filters for accurate occupational noise exposure measurements.
Calculate Leq (equivalent continuous sound level), TWA (time-weighted average), and noise dose with professional-grade accuracy.
Track and review all your measurements. View detailed session statistics including average levels, peaks, and exposure calculations.
This app can be used offline without connecting to the outside world. It can be used to measure sound level while in travel or in secret mission. Check "Setting" tab to see if you have measurements available.
Monitor occupational noise exposure and ensure compliance with safety standards
Track noise levels and calculate exposure limits for workers
Ensure safe sound levels during concerts and events
Check ambient noise levels for comfort and productivity
Quick reference measurements for sound professionals
Teach students about sound, acoustics, and hearing protection
Normal conversation, quiet office, library. Safe for prolonged exposure.
Traffic, restaurant, vacuum cleaner. Generally safe with occasional breaks.
Heavy traffic, power tools. Limit exposure time and consider hearing protection.
Concerts, machinery, power equipment. Hearing protection required.
Rock concerts, sirens, firearms. Immediate hearing damage risk.