What is Acoustic foam?
'''Acoustic foam''' is a type of [[foam]] used for acoustic treatment. It makes [[sound wave]]s in the air weaker, thereby reducing their [[amplitude]]. It is used to reduce or control [[noise]].<ref>{{Cite web|title=Acoustical Foam {{!}} Sound Absorbers {{!}} Studio Foam|url=https://www.universalpowerconversion.com/acoustical-foam|access-date=2020-10-23|website=www.universalpowerconversion.com|archive-date=2021-04-11|archive-url=https://web.archive.org/web/20210411004848/https://www.universalpowerconversion.com/acoustical-foam|url-status=live}}</ref> Acoustic foams are typically softer and more lightweight than their sound blocking foams. The open and flexible cell structure of acoustic foam acts as a natural soundwave absorber and prevents noises from reverberating off hard surfaces like walls, floors and ceilings. It does this by converting existing sound energy to heat and reducing the ability of soundwaves to bounce back into the room. Depending on how it's used, this type of foam can also enhance the acoustics within a room. Sound absorbing foam cut into pyramid or wedge shapes can be used to manipulate vibrations in a way that improves sound quality.<ref>{{Cite web|title=Sound Absorbent Panels Specialists {{!}} Sound Absorbing Panel Installers|url=https://sound-absorbent-panels.co.uk/|access-date=2020-10-31|website=Sound Absorbent Panels|language=en-GB|archive-date=2020-11-08|archive-url=https://web.archive.org/web/20201108121129/https://sound-absorbent-panels.co.uk/|url-status=live}}</ref> Acoustic foam can be attached to [[wall]]s, [[ceiling]]s, [[door]]s, and other places in a [[room]] to control noise levels, [[vibration]], and [[echo]]es.<ref>{{Cite web|last=|first=|date=|title=Effects of egg crate foam as acoustics panel|url=http://www.partfoam.com/eggcratefoam.html|url-status=live|archive-url=https://web.archive.org/web/20190414025205/http://www.partfoam.com/eggcratefoam.html|archive-date=2019-04-14|access-date=|website=pfa}}</ref> Many acoustic foam products are treated with [[dye]]s and/or [[fir