Silence in mechanics is often overlooked. We break down SAIJIA’s unique approaches—precision-machined gearboxes, sound-absorbing enclosure plates, and smart fan-speed control—that keep operational noise below NC-20 standards. Case studies from two major concert halls demonstrate how “silent operation” reduces audience distractions and allows for lower master volumes without feedback. Sound engineers and venue operators will find guidelines for verifying machinery noise levels and integrating decibel meters into acceptance testing.