Editing Soundproofing (section)

===Reflection===
When sound waves hit a medium, the reflection of that sound is dependent on the dissimilarity of the material it comes in contact with.<ref>{{Cite web|url=http://www.physicsclassroom.com/class/sound/Lesson-3/Reflection,-Refraction,-and-Diffraction|title=Reflection, Refraction, and Diffraction|website=www.physicsclassroom.com|access-date=2017-07-10}}</ref> Sound hitting a concrete surface will result in a much different reflection than if the sound were to hit a softer medium such as fiberglass. In an outdoor environment such as highway engineering, embankments or paneling are often used to reflect sound upwards into the sky.