Acoustic Foam For Soundproofing
Acoustic Foam is Best For Soundproofing your home
ACOUSTIC FOAM NOT BLOCK SOUND
This title basically explains everything. I explained that acoustic foam doesn't block out sound about five times a day to potential customers who want to know how to soundproof it. The question keeps popping up: "Why not? What is it used for?"
It's not that I'm trying to spoil anyone's day here - I hope that some foam will keep the sound from penetrating the walls. I will sell a lot. But physics is physics. We will not sell anything to someone who has no chance of meeting customer expectations.
Now, many listener and people familiar with the overtone of sound will say, Well, when you having a extremely small space with a larger sound sources, the sound waves will accumulate a certain frequency and perhaps amplify them due to the modal response of the housing shape - and add absorption. in confined spaces this would actually reduce the total dB leakage to the environment, "but that's not what I'm saying.
The question I want to ask is that placing a few boxes of 2 "thick foam here and there on a partition in an apartment doesn't stop anyone from listening to other people's TVs and subwoofers at 3:00 am.If the walls are 100% lined with 2-inch thick foam, Human prediction will not prevent sound from passing directly through the wall. This Soundproofing acoustic foam is porous and does not block sound simply because it is porous, which allows sound to pass through it.
For example, a few years ago some speakers used foam to cover the speaker grille. If foam blocks sound really good, then why? Or old Walkman headphones on the back (I'm showing my age here). They have foam right on top of the handset to make it more comfortable on the handset..