Soundproofing One Wall, Soundproofing Options

[sethjacquay]

I am going to be moving into a new apartment next month and
my new landlords warned me about a dude in the building next door
who might complain about sound.

I am interested in soundproofing the wall that the neighbor and I share
probably about 10' by 8' in size.

Obviously, headphones would work, but when I am singing and playing
acoustic guitar I will feel better about letting loose with some sort
of sound barrier on that wall.

Any suggestions?
Does anyone else have some sort of setup they use?

I was thinking about those foam absorbers, but I read that they actually
don't block the sound and might actually cause him to hear more noise.

I am considering a vinyl barrier that would hang from the wall. It won't block everything
but should add another layer to help reduce the sound transmission directly through the wall.

[Jaysee]

Just an idea on the soundproofing issue, I have a set of those old fashioned 12ft long rails for drying/airing damp laundry which are suspended from the ceiling in my lounge. They are raised + lowered by a pulley system. I've almost removed the fittings loads of times so I can decorate properly; but perhaps they might come in useful if I relocate downstairs and claim this room as my 'studio'......
It would seem to be an ideal contraption for suspending those thick sheets of dense foam or whatever it is to improve the sound, both inside and out.
Or even cheaper..I wonder if I were to hang a large thick(dry!) duvet (or two) from this it might help protect the neighbours from my infernal din? The ajoining wall to the next door property is on the opposite back side of the duvets from where all the racket will be,
Hmmmm, food for thought.
This room also has the advantage of solid concrete floors with carpet on top. Not as warm as wood flooring in winter but it certainly won't transmit any vibration, short of earthquake anyway! What d'ya think?
cheers, John.