Damping street noise
July 3, 1981
Aside from keeping the windows shut, there is at least one other solution that is effective in reducing sound with the window open. It consists of installing a sound baffle.
A sound baffle can take various forms. Essentially, it's a flat panel (thin wood, metal, etc.) installed across the open portion of the window. The surfaces of the baffle facing the source of the sound are lined with a sound-absorbing material, such as a thick carpet, which can be tacked or cemented in place.
A similar device can be designed for horizontal sliding windows.