In order to soundproof external noise, do I need to build wall stud on concrete walls?

Question

I assume this wood framing is the wall stud.

My room looks like as follow with concrete walls

In order to soundproof external noise into my room (red circle), do I need to build wall stud?

Answer 1

The way I have seen it is to use 2 X 6 on each end and floor and ceiling of the wall then build two separate walls with 2 X 4. Stagger the 2 X 4 in the walls so the only solid contact for sound conduction are the 2 X 6 ends. Fill the space ( now 5.5" instead of 3.5" ) with insulation. The result is little solid contact ( at the ends) for conduction and a thicker sound absorbing insulation. I was describing a partition wall , but essentially you could put the same thing against a concrete wall ; The important factor , you don't want 2 X 4 touching both wall surfaces as they would conduct sound.