Hummm… I’m not an expert on this subject matter, but you can take a look at what some individuals use to bass proof and sound proof their vehicles.
At my University, they have a sound proof room, and it’s a pretty expensive setup (almost like a chamber) and it’s designed to give absolutely no echo no matter how loud you yell or play music.
Try looking outside of the box… I know that some companies and even vacation resorts pay $$$ to pretty much soundproof their generators because they are so loud. It may not be 100%, but does a great job.
There have been already a lot of good examples how to do it more cheaply, but with some hard research, you could find a better way (maybe cheaper, maybe not).
Maybe the cheapest way is to host the party elsewhere lol… or invest in some decent earplugs for sound canceling
theres some good articles on the net about this. but if youre serious about it.
buy drywall, make sure all wall surfaces are at an angle not perpendicular to each other and stuff insulation between the new drywall and the actual walls themselves. you can acoustically pad the outer surfaces of the drywall as well for good measure. just a few degrees will do the trick.
If you wanted to go all out i could help you work out the rooms resonant frequency and find the materials and space it’d need from the wall + angles to best suit your problem frequencies.
Wouldn’t require much money, just some careful planning - this way you could also improve the sound in the room (Obviously any kind of insulation will prevent reflection, but you’d lose certain elements of sounds and you might get dead spots).
Let me know if you want me to, i’ll need room dimensions, how many people on average in there, and some info on speaker placement etc.
Also you have to remember that people have high sound absorption, an empty room might sound fine but when you fill it with people you might find you’ve killed the sound in there by over dampening.
The most on point part of this thread, def worth repeating!
If you just want to soundproof, all you need is mass. mass. mass.
A sound wave is a vibration, in the air, vibrating freely. when it hit’s a piece of foam, it’s vibration get absorbed a little bit - it’s harder to vibrate through foam than air.
Therefore by the time it’s vibrated through the foam to the other side there’s less energy in the sound and it becomes quieter.
If it hits say, a piece of concrete. Then concrete is pretty dense stuff, VERY hard for a little soundwave to vibrate. It will though (at a loud enough volume) still get through.
It’ll be much MUCH quieter by the time it gets to the other side though, as all the energy will of been absorbed by the mass of the material.
Basically put enough mass in the way and you’ll be able to stop the sound escaping and pissing off the neighbors! But to get enough mass with foam, you’d probably have to fill the whole room up lol…
imagine this..
Put a foam cushion over your speaker cone and see how quiet it gets.
Now get a concrete slab (or anything high density and the same thickness as your cushion) and put that over your speaker cone instead. hear the difference? that’s why you need the mass!
Sounds to me like you just need to treat the room with some bass traps in the corners…
Just a side note; When sound proofing, an alternative to MASS is DENSITY, I use CLOSED CELL FOAM (armaflex, sprayfoam) daily (industrial sector) for this purpose.
