How does sound absorption work?

Ive heard that a perforated acoustic absorber plate (like MDF wood, for example) has even more chance of absorbing noise than a smooth one. Is that true? And if it is, does that mean that if you perforate that piece of paper in the video, does the ball will bounce even less?

what a nice guy, thanks alot

brilliant

The problem is that the absorption doesn’t take place at the surface, because porous absorption is only effective at slowing down air particles with a high sound velocity. This is at 1/4 of the wavelength.

❤

I love everything in this video, a well spoken man in a suit, kneeling in his bathroom explaining physics in very simple way, is just perfect. Great job buddy 👍🏻, keep it up.

lovely explanation, i love your simplicity bro
keep it up

Nice video!!!! Thanks for it!!

This video is perfect.

well example

😂...love the superfluous cat walk comments...good explanation too!