HI everybody I was reading your post great information.I have a question in the picture below where the word FILL is the only sheet rock that doesnt have insulation or a foam.I want to STOP the music or noise to be heard in other room . i want to use my monitors loud once in while do you know which one is better fiber glass or mineral wool?or any other product? I want to either open the sheet rock and place it in between the wall or to just place it on top of the sheet rock covering the wall. my room is small 14 by 6 feets with closets tv bookshelf my workstation is my pc, midikeyboard,2 monitors ,I know the have to be place same distance.No vocals just microphones for acustic guitar.Thank you for you help.

Your pic isn't showing up.

Wool in the wall will help minimize transmission but there is a lot else that needs to be done if you want to really be able to play loud without hearing it outside.

Wall needs to be more massive (think another layer of drywall).

Door needs to be solid core instead of the likely hollow core.

Door needs to be sealed

Don't forget that sound will also go through the ceiling and flank around and down into the other space.

Bryan

Hi thanks for you response and advise problably the hosting image server that I used was only for a few hours. I hope this one is better.
Like you said I have to insulate the ceiling and floor .The rest of the room got the foam insulation for dry wall that everybody uses plus another foam that I got many years ago but I can recall the name so the only wall without Insulation is the part with the word FILL in the Image there. I have to check wool and I was checking some prices but is way too expensive to insulate with auralex insulation products maybe only the floor with one mat, cant afford to do the ceiling but I was thinking in using the "white foam" that comes with boxes when you buy a new product. Can I use that in the ceiling and doors ? as you can see the link there with the puppy on page 324-325.Please let me know thanks.

www.uline.com

The foam is a waste of time and money - but then again - so isn't just filling the area noted as "fill".

Reality is that creating sound barriers require things to work in your favor - you have to understand that your entire assembly is going to be as good as your weakest point.

It is impossible (note that I did not say hard, expensive, or difficult - I said impossible) for you to acheive any level of isolation on one side of the room that will far exceed that of any other surface in the room.

Also note that just installing insulation is pretty much useless for acheiving any degree of isolation.

What is required is mass and a decoupling from structure.

If all you do is insulate you will be luck to add a few dB of isolation - and all of that pretty much in the upper frequency range........ adding insulation to the inside surface will not change what makes it through to the other side - it will only effect the quality of sound within your room itself.

Even is you add mass to your existing walls and ceiling/floor the gain will be slight and will only be in the mid to upper frequency range......

To acheive any real isolation of lower frequencies you need to decouple the inside surfaces of your room from the rest of the building structure - only then will you begin to make any real gains.

Sincerely,

Rod