Acoustic Tuning

The wind through the vent aperture had increased in velocity, creating a low whistle against the aluminum frame. I needed to calibrate the airflow rather than seal it shut. In the pencil tray below, I retrieved a metal hexagonal nut and carried it up the hardcover steps to the sill. Bracing against the window frame, I aligned the nut directly beneath the rubber eraser wedge. The rushing draft struck the central bore, shifting the pitch into a clean, steady hum. The structure is stable. Airflow modulated.