Free Flo - Architectural Linear Slot Diffusers

How can I get rid of white noise coming from my AC vents? (They're currently linear slot diffuser style vents and I'm wondering if that's

Maximum single section length is 144”; able to be joined to create long, continuous runs • Integral pattern controllers constructed on 24” centers OPTIONS •

single slot 4090 Diffuser face made of extruded aluminium sections; For variable and constant volume flows; Suitable for continuous linear arrangement; High induction results

single coil in humbucker slot – Air supply and return in a single unit for greater aesthetics and uniformity · – Fewer diffusion units for a more economical installation ·