Does soundproofing improve or harm sound?

G, Mass, in the four walls as well as 5/8 sheetrock will make an audible improvement. Cross Fur the ceiling AFTER sheetrock with RC and you will reduce or eliminate the ugly treatments later. Use 6inch accoustic insulation in 31/2 inch walls combined with the 5/8 board and you reduce the resonant freqency of the wall. These few extras will generate HUGE returns on money spent. Z.

Are you sure the GC knows anything about acoustic treatment vs. soundproofing? The former is to improve the quality of sound inside the space and the latter is to keep it from getting out of the space. Not at all the same.

For info, take a look at:
www.rivesaudio.com
www.realtraps.com

Kal

Soundproofing keeps the sound of airplanes and crying children out of the room and minimized the sounds of explosions in the rest of your house.

With regard to getting a flat response and killing slap echo within the room, that's a whole other ballgame that requires diffusers, absorbers, bass traps, etc.

QuickE

If you play your music loud, and you feel that soundproffing the room would keep your music from disurbing the rest of the household, go for it. (I only wish that I had that option!) I don't think it will affect the sound quality (to a large extent) to be honest.

My two cents worth anyway.

Sound proofing is different, and I would "assume" that it wouldn't help the sound out in the way you would want it to. It might just make it so you can listen as loud as you want without bothering anyone else.

I hear that sound proofing is incredibly expensive, so I don't know if he meant real sound proofing.