I'm also open to better ideas if there are any.
I mainly just need my room to be soundproof enough to prevent anyone outside of my room from hearing noises inside of my room. Noises that are about 30% louder than normal talking volume.
Not only do I want to prevent eavesdropping if I'm having a conversation with a guest or over the phone/internet, but I also don't want to disturb others in nearby areas of the house if I'm watching videos or playing music through speakers.
There needs to be soundproofing on all 4 walls of the room. The ceiling is out because there's no one above my room anyway, and the floor is out because there likely aren't any practical options for me there.
On the other side of the first wall there is another bedroom, behind the second wall is a hallway, behind the third wall is a frequently used area of the house, and behind the fourth wall is outside.
I'd say that the fourth wall will need the least soundproofing (likely only on the windows), since it's naturally more difficult to hear sounds from my room from outside, even if my window is open.
The other three walls need about equal treatment.
First of all, what's so special about acoustic foam? I've seen it in action in videos, and it clearly works for echo reduction and soundproofing, but why?
Is it a special type of foam or just regular foam?
The prices are pretty insane if it's just regular foam.
Which patterns/styles of acoustic foam are more effective?
I got this idea when I saw a video of some guy soundproofing his room by covering all of the walls in acoustic foam. Seems like it works very well. (https://www.youtube.com/watch?v=zJoS58_Wz2c)
My budget won't allow for covering the walls as much as that, but I believe there are ways I can help make up for it.
Does anyone know if the 2 inch thick foam is significantly more effective than the 1 inch thick foam for this task?
If I can find 1 inch thick foam instead the price might be a bit lower, but if it's significantly less effective then perhaps it's not worth it.
Anyway, I estimate I won't need more than 60 acoustic panels, but I could be wrong and may end up needing up to 84. It's not the end of the world if it turns out that I need more. I could buy the additional amount another time.
The 2 inch thick panels I'm looking at will be about $170 for 60 of them.
The 1 inch thick panels I'm looking at are sold in packs of 50. 100 of them will be $150.
You could argue that going for the 1 inch thick ones will allow me to place more at a lower cost, but the smaller thickness may be less effective and not do as good of a job.
I want to maximize the effectiveness of these panels. According to this soundproof expert (https://www.youtube.com/watch?v=GLjhrXFo0Kw) if you have multiple layers of walls, ceilings, insulation, ETC, it will dampen sound significantly more.
Obviously I don't have the option of going to that length, but perhaps I can apply the same concept with the acoustic panels. I don't know if that will actually be effective, so if anyone knows or has experience with that, advice would be greatly appreciated.
I've seen people use slabs of cardboard to place the acoustic panels onto, and then stick the cardboard onto the wall.
I can't find decently sized cardboard at a good price, so I'm thinking I'll use bristol boards instead.
I'll take two sheets of bristol board and stick them together with an adhesive. In between the two sheets of bristol boards will be slabs of wood or something else (like a less expensive type of foam) in order to create a similar effect of having space between multiple walls, and then the acoustic foam will be place on top.
Alternatively, I can use the acoustic foam between the bristol boards as well as on top of it (or would that be counterproductive?). This would require buying more acoustic foam though.
On top of the bristol boards I can double up on the acoustic foam, placing them on top of each other. That will also require buying more acoustic foam.
Would that actually help to further soundproof my room?
If these methods aren't too effective, what can I do to increase the effectiveness?
Are there any better ideas?
What is the most effective way to layout the panels on the wall if I can't cover the entire wall?
Which position on the wall should the panels be placed?