Sound proof bedroom

Try using Acoustilay underlay.one of the best soundproof underlay.hope that helps

Basically the foam or felt would be best choice to absorb that unwanted sounds . Upgrade carpet to a nice thick textile backed one. See no reason to go thicker than10mm but a nice firm PU underlay would be soft under foot and absorb more sound. This combination should be affordable and achieve your desired outcome. An acoustics underlay is only part of the solution and could be more costly for same effect. Definitely suggest fixing the boards first though as I’m sure that’ll be upsetting neighbour as much as they’re annoying you. Win win I reckon boards done upgrade carpet and underlay everyone happy. Last note your doors will need trimming bear in mind when ordering that new plush flooring

Foam or sponge is the best material for underlay to reduce noise levels. PU foam is the most popular choice, made from recycled foam off-cuts, available in a variety of thickness options and offering high comfort and performance.

Yes you can use acoustic underlay but it's quite expensive the cheaper alternative is HD underlay (high density) which will also do the same job as acoustic underlay and just replaces the existing underlay.

Yes used this before and had no complaints.It is expensive but worth the money.

These answers aren't addressing what you asked, to soundproof a room build a floating floor by lining the floor with rockwool insulation and then build a chipboard floor directly on top of it. This should be built up on wooden battens which have rubber isolation; two or more layers of chipboard are needed to create a rigid and suitably massive surface. The chipboard should be laid so that the joints in the bottom layer don't coincide with any of the joints in the top layer and a thick felt barrier should first be fixed around the walls so as to prevent the edge of the floor coming into direct contact with the walls. These foams and underlays will help to reduce mid to high frequency reflections within the room but will not help with any bass or low mid frequencies, and none of it will reduce exterior sound bleeding through.

Hi Jules, if the sound is from below + noisy / creaky subfloor, i would guess you have poorly fixed chipboard flooring. I would get someone in, ( i do this a lot for clients), to uplift the chipboard, line the void with rockwool & celotex, then refit what you have, (but as Don says), upgrade to a Pu underlay.Hope this helps, Chris.