Our homes today are inundated with noise from all around us. From the outside world, highways, airports, trains and even boating marinas fill our lives with noise. From the inside of our homes, we have dozens of appliances that make loud noises, not to mention the fact that many of us own state-of-the-art home sound systems that can produce a good deal of indoor ‘noise pollution’. Many homeowners who go through a re-modeling project often choose to soundproof certain rooms in their homes while they have access to the framing or the ability to redesign a room properly from the start based on sound acoustic technology. Whatever the sound is that is bothering you, if you plan correctly upfront, you can minimize the noise from music, laundry room humming, and even bathroom noises.
First off, if you are a handy person and have a few common tools at your disposal it is possible to install soundproof insulation yourself and save on the cost of having to hire a contractor to do the job for you. If you would prefer to hire someone to do the work, you can get in touch with a insulation contractor who will come to your home to give you an estimate regarding how much it would cost to have the soundproofing installed. The price of course will depend on how many rooms you wish to have soundproofed and the type of material you choose. 
A common type of insulation that many people assume provides good soundproofing is the kind that is blown into the walls. Blown insulation does an “ok” job of keeping unwanted sounds both from leaving a room and entering it. However there are other choices that are better for pure sound proofing purposes. Some of the world’s top insulation manufacturers such as Owens-Corning make insulation that can be blown into walls. Usually the blown in insulation is made of cellulose or fiberglass. Celloluse insulation is made of recycled paper and other plastics and is the more eco-friendly choice of your options. Fiberglass is generally the worst performer for soundproofing as it even is thought to amplify sound waves because of its glass makeup. For reference, when considering the option to blow in insulation into existing wall structures, it is generally recommended to hire a professional for this job as he will have the proper equipment and know-how to do the job correctly.
If you have a major renovation job in mind or an addition planned for your home, this is a good time to consider adding soundproofing that the building contractors can build into the rooms being remodeled or built. A contractor can use closed cell foam insulation in this case, or perhaps even mass loaded vinyl sheeting placed directly over the studs, walls, and ceilings. Another option is to add a thin dense layer of wood sheeting or some extra drywall. These options will help to isolate those areas so that they are much quieter than regular rooms.
For other choices in superb soundproofing there are acoustical insulation products on the market that work exceptionally well in cutting noise. These can be made from materials such as cotton fibers that are designed for interior and exterior walls, ceilings and in attics. This type of insulation is easy to work with and it is not irritating to the skin or lungs like fiberglass and it is eco-friendly as well.
No matter your soundproofing needs, there is a wide range of soundproof insulation available to you that are all designed to make your life a bit quieter and much more relaxing.
Interesting article. I like your points on insulation. I heard about this product called Quiet rock which provides better soundproofing than few layers of drywall.