Low frequencies travel along the wall

[FunnyPocketBook]

So I've heard multiple times that low frequencies tend to travel along the wall and are most present in corners (and therefore sound isolation for low frequencies are put in the corner, if I am not mistaken.) However, I have never gotten any explanation why. Can someone help me out?

 

[rufus.K]

More energy at apparent volume.
higher frequencies get absorbed more easily, longer wavelengths (lower frequencies) less so.

 

[Alkali Ike]

Low frequency sound waves gather & reflect back from corners, causing the primary wave and secondary (reflected) waves to combine and reinforce each other. Putting something like TubeTraps in corners helps control this.

TubeTrap - Welcome to the Real World of Bass Traps

Well that's what they say.