RYUN Engineering & Research
Blog & Engineering Notes
Things we built, measured, or got wrong. Written by the developer, dated, and updated in place when code or benchmarks change.
Articles (2)
#StudyHushΒ·12 min
Speech Privacy in Open Offices: How to Calculate Acoustic Radius and Speech Transmission Index (STI)
Active Noise Cancellation headphones fail to block human speech due to rapid mid-to-high frequency phonemes. Learn the physics of Speech Transmission Index (STI), acoustic radius calculations, and how calibrated sound masking preserves deep cognitive focus.
Nov 11, 2026Read
Β·11 min
Noisli and myNoise Alternative: Free Procedural Sound Masking and Browser Telemetry
Noisli caps free listening at 1.5 hours per day, while myNoise features complex multi-slider calibration. Discover how StudyHush delivers a 100% free, zero-signup alternative using non-repeating Web Audio API procedural sound synthesis and real-time acoustic telemetry.
Nov 10, 2026Read