Acoustical experts say that perforated materials like metal and wood can help to diffuse and absorb noise. Although these materials are often used in larger spaces, they can also be used to line the inside of window frames to help absorb some noise. In this video, Soundproofist creates a D.I.Y. example of an absorbent acoustic "stick" that can be inserted in the empty cavity between a double-paned glass window and a secondary plexiglass insert or overlay. Putting sound-absorbing materials around the inside of a window frame along with a plexiglass overlay may to improve noise reduction.
Everyone has different-sized windows and walls. You may find materials that are better-suited than the ones used here, or you might have access to more tools to make a more refined absorber. These are ideas to help you solve your noise problem in a non-destructive way, especially for renters.
Some research papers on micro-perforated panels made from metals and other materials:
*From Purdue University*: [ Ссылка ]
*From Science Direct*:
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*From Springer Link*:
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More information on noise and acoustics:
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