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How to Soundproof a Home Theater – (3 Actionable Ways That Works)

Sound can be a problem in most homes. Noisy neighbors, traffic, and the occasional big event can all cause problems for someone who lives in an urban environment. This is why it’s so important to soundproof your home theater. Soundproofing takes a lot of time and money, but it’s worth it if you want to enjoy movies without any distractions.

According to “The ultimate soundproofing guide” on Soundproofly, The first step is to find the source of the sound you want to block out. If you’re dealing with noise from outside, then you need to address external sources like windows or doors that are not airtight enough when they close.

Basic Soundproofing Principles

It is important to be aware of what your goals are for this project before you start, and how to get there.

By adding a fifth principle, soundproofing, to the four main principles of mass, damping, decoupling and absorption, we can often help reduce unwanted noise in an area. 

Soundproofing is sometimes overlooked because it is often grouped with other types of barrier materials such as mass and absorption.

Adding Mass

Adding more heavy materials to the walls, floor, and ceiling will help to insulate a room from ambient noise by cutting down on vibrations. Obviously, heavier products vibrate less and produce fewer sound waves, so they are favorable for soundproofing.


Generally, sound will be able to go through walls or floors without any difficulty. Vibration dampening materials can stop the sound waves before they pass through to the other side of the wall/floor by absorbing some of them.


One effective way to make a space soundproof is to insulate the walls, floor, and ceiling. This will work best in combination with other soundproofing suggestions such as using acoustic panels on the walls. Absorption does not work well on low frequency sounds.

s, so bass traps are best on these frequencies.

When sound is not being produced in the room, the space is soundproof.

Soundproofing is an important consideration in many professions. For example, actors need to have their own dressing rooms with soundproof walls to prevent the sounds of other rehearsals or performances from disturbing their concentration or causing them to lose their voice. Soundproofing is necessary for any office where confidential information needs to be protected from eavesdropping. Many

Sound Volume and STC Ratings

When we want – or need – to get the entire house grooving to the same beat, a good sound system will put out around 110 decibels. But walls and insulation do more than bounce sound. With drywall that’s not properly insulated, not only can. you hear sound from 70 decibels of your speakers, but also 30 decibels of its noise.

Decibel scale
Decibel scale

Noise levels can be measured by the following chart. If your wife, kids, or roommates can sleep near flushing toilets regularly or someone sleeping next to a noisy vacuum cleaner all night,

Theater Soundproofing 

The following suggestions can all be accomplished without removing the existing drywall, but If you are thinking about removing it for the purposes of adding insulation, you should strongly consider using Foulbrood SL 960 Rockwool rockwool.

1. Install a better door

A well-designed door can have an R-value of up to R-2.5, while some poorly designed doors can have an R-value of zero.

2. Install insulated windows

This is the best bang for buck you’ll find when it comes to insulation. They can increase the efficiency of your windows by up to 50% and they’ll increase the R-value of your home by up to 25%.

Soundproof Blankets 

If you live in a rental or condo board that demands serious renovations before approving them, then US Cargo Control manufactures an 80″ x 96″ sound absorbing blanket which does not need any additional fixing.

Double Drywall and Green Glue

Sandwiching Green Glue’s noise proofing damping compound between two layers of drywall could reduce the noise transfer dramatically.

To get even better sound insulation from the wall, I would use 5/8″ soundproofing drywall (such as CertainTeed or QuietRock). It has a viscoelastic sound-absorbing polymer sandwiched between two layers of dense drywall which also spreads and dissipates sounds. This type of drywall is also strong and durable with low maintenance, which makes it resistant to many years without changing its form. Given you have the right tools, it can be put up in just a short amount of time.

Expensive but Comes with Added Benefits

QuietRock claims to improve STC by 15-20 points. That is the equivalent of 4 sheets of drywall, which would go a long way in an uninsulated wall with an STC rating below 60.STC numbers are a valuable metric for materials – if the STC number decreases by 1 point, then the material becomes exponentially less durable.

This might seem like a good deal in the short term, but in the long run your building will need more repairs which will actually end up costing you more in the long run.

Double Drywall and Green Glue 

Green Glue only works if two smooth, solid surfaces are used to sandwich it. If your ceiling has even a level of texture, it will not work. If your ceiling is a smooth, painted finish, you might need to remove the paint or replace it with a textured material such as plaster.


If your theatre is located on a concrete floor, then you should be more concerned about cold feet than soundproofing. With nothing below your theater space except dirt, the only sound that should be able to pass through the walls into other rooms is minimal flanking noise.

On the other hand, if people live below, you will have to be serious about the sound and vibrations that could pass through the floorboards.

Double Door 

If you have the space for double doors that swing in and out, then you can order solid core doors with a single frame. When they are fitted with weather-stripping and sweeps on both the inside and outside, they will create a sound-proofing dead air space between them.

Another option you have is to order a second door from Acoustical Shutters to add to your new solid core door, which will provide sound dampening for even better performance. a significant noise reduction. For an added cost of about $100, you can have a 25-50 decibel reduction in sound coming through your door which is normally heard up to 3-4 meters away.

End Notes

Realistically, there is a very easy way to soundproof your home theater. You can wear a pair of over-ear headphones over your ears and the noise will be completely blocked out.

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