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 (1)
#Speech Transmission IndexΒ·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