What is Acoustic Insulation?

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  • Written By: Malcolm Tatum
  • Edited By: Bronwyn Harris
  • Last Modified Date: 05 April 2020
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Acoustic insulation is a type of soundproofing that attempts to prevent sound from entering or exiting an enclosed space by creating some a barrier between the interior and the exterior area. Because sound is able to travel in more than one fashion, the exact process and choice of materials used to manage sound insulation will vary. In some cases, the insulation does effectively reduce sound transmission, but does not completely eliminate the transmission of sounds.

One of the more common approaches to acoustic insulation is the creation of a barrier of some type between the origin of the sound and the surrounding area. The installation of panels on interior walls is one example. With this application, the panels contain foam or other materials that can help to absorb echoing, reverberations, or other types of sound transmissions.

Another option with acoustic insulation involves inserting sound-reducing materials within an existing wall. While this approach does not eliminate sound from penetrating the wall itself, it can usually absorb enough of the sound to minimize the amount that emerges on the opposite side of the wall. This approach is often used in apartment buildings and other areas where people live and work in close proximity.


The use of specially treated building materials can also provide a degree of acoustic insulation. By utilizing boards that are coated with sound repelling properties, it is possible to build interior walls that minimize the transference between rooms or compartments. When coupled with soundproofed doors, the result can be effective enough to handle everyday noises such as snoring or talking in a normal tone. Louder sounds may still filter through, but will be significantly muffled.

For the maximum amount of acoustic insulation, it is usually a good idea to employ several insulating options at the same time. For example, constructing interior walls with wood panels treated to reduce sound, covering them with padded panels, and making use of sound reducing foam insulation to fill the wall cavities will greatly reduce and possibly eliminate the movement of sound from one area to another.

Choosing the right medium for effective acoustic insulation often requires the advice of experts. This is true whether designing a new structure or making renovations to an existing residence or public building. A professional can make responsible suggestions based on the degree of sound reduction desired, the overall layout of the space, and the functions that will take place within the building. While seeking professional help may be somewhat costly, it can make the task of choosing the right acoustic insulation options much easier and will save money in the long run.


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Post 1

I could use help with ideas to resolve noise echos inside our home. I have twin two-year olds whose octave range goes beyond what is comfortable to the human (mainly their mother's and father's) ears.

What could the average person do to absorb some of the noise? We have hard floors and minimal furniture. I was wondering about building something like a large picture or set of frames, but using fabric and quilt batting instead of a picture. I would appreciate any and all suggestions.

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