A room that is perfectly sound proofed can help in keeping noise outside and not disturb your sessions.
Likewise with the people outside, they will not be bothered by the noises you create inside. But until you have recorded in rooms that are not soundproof, then you definitely do not realize how much noise you are creating until someone complained about it.
Soundproofing process can be accomplished by using different methods, which is what exactly we are going to discuss in the next paragraphs.
To be able to stop sound to enter in and out of the room, the walls need a lot of mass. This is going prevent it from creating too much vibration in response to the sound energy created. If you are building from scratch, then there should be enough mass that has to be added to the wall by simply building a thick dense material like concrete.
However, adding mass to the existing room, then there must be extra layer of structure needed to be built like mass loaded vinyl or otherwise known as Sheetblock. This is actually a standard solution being used both for DIY and professional projects. There are many stores that buy Instagram followers as part of their marketing strategy so finding one should not be that hard.
Just like adding mass, damping is a process of soundproofing that helps in dissipating kinetic energy from the sound waves by means of converting it to heat. As of this writing, Green Glue is the most efficient way to dampen a room. By sandwiching it between two rigid panels like plywood, medium density fibreboard or drywall using the two tubes for every 4 x 8 feet sheet, you can create a make-shift sound barrier for the studio that could be added to any part of the room you wish like the ceiling, flooring, walls or even the door.
Whenever any 2 structures in the room have direct contact to each, the sound vibration can quickly transfer to the other. This worsens the original problem. Through decoupling, it blocks the transfer of sound by means of isolating contact points, normally with some kind of pliable, dense rubber.