Some beds don't make noise no matter what you do on them. I have no idea what kind of bed I have but I can do backflips on it and it doesn't as much as make a creak.

The thing is beds DO have shock absorbers they are called springs lol. But so many beds are cheap/made like shit and screech/creak/slam into the floor while you are
banging away on it.
I'd consider going over to sleepies if you're in the states and getting a quality spring box mattress plus throwing some memory foam on top. And it can actually be the floor thats responsible which in that case you're gonna have to start ****ing on the first level of the house. I notice in some houses no matter how good a bed the floors are not built right and the slighest bit of noise always makes it way through.
And in that case the only hope is knocking down the house.

The best part about my room is not actually my bed though, its the fact that its a bedroom studio and properly sound proofed. You can shoot a gun in there and its barely audible outside the door, actually tested it by setting off firecrackers lol.