Soundproofing A Drum Room

Here at the Soundproofing Store we receive many enquiries about music rehearsal rooms and recording studios. One of the mos popular enquiries is for drum rooms. Due to the nature of an acoustic drum kit, they tend to create a lot of airborne noise and also a lot of vibration due to the kick drum.

So...if you are a drummer, or maybe have a child or family member that has taken up playing drums at home or maybe you are a school music department with a drum room, how do you reduce the amount of noise that escapes the drum room and disturbs other people?

Well, there are a few things to consider, but I will guide you through the important points.

First, here are the main fundamental physics we need to consider.

• 1. Airborne Sound (voices, music etc) is only blocked by mass. To block airborne sound, we need to add as much mass as we can to the walls, ceiling and floor. Mass is a complex thing to get into, but at the simplest level, the heavier and more dense a material is, the more mass it will have. i.e concrete has more mass than wood.

• 2. When sound hits a surface it becomes a vibration energy which can transfer through solid materials and surfaces very easily. Bass and kick drums will also create a lot of vibration energy. For a high standard of soundproofing, we need to absorb or decouple this vibration to stop it from transferring into the structure of the building. To do this we use the "Room Within A Room" technique. There will be more on this later.
  

• 3. Soundproofing is like waterproofing - To contain the sound within the studio, you will need to soundproof all the walls, ceiling and floor. All weaknesses such as windows, doors and air vents need to be considered, and any air gaps need to be sealed, as sound will always find the weak point and still get through.

  "Room within a room?"

  For live music levels of noise we need to build a " room within a room ", with the inner room decoupled or isolated from the outer room. We do this by using a system such as our ReductoClip system . These are fixed to the solid wall and ceiling joists, we can then build new wall and ceiling layers (creating the inner room), by fixing these layers onto the ReductoClip rather than being fixed directly to the wall. The ReductoClip act like shock absorbers, so when sound hits the new wall layers and turns into a vibration energy, the ReductoClip   absorb this energy stopping it from transferring into the structure.

We then need to add high mass materials such as two layers of 15mm acoustic grade plasterboard which has a higher mass than standard plasterboard. You can also improve the performance by adding different materials (different types of mass block different sound frequencies better than others). These include FlexiSound 5 .

  On Solid Walls - We get the highest performance by building a timber frame 10mm in front of the existing wall, isolating the frame from the surrounding surfaces using isolation strip . We then fill the frame with acoustic mineral wool  and then fix the ReductoClips and furring channels to the frame.

  On Stud Walls - We remove the plasterboard layer of the wall to expose the timber frame inside. We then fill the frame with acoustic mineral wool and add our ReductoClips to the frame.

Ceilings

We use the same technique on the ceiling to block sound travelling above.

On a Timber Joist Ceiling - We remove the current plasterboard layer exposing the timber joists. We fill between the joists with acoustic mineral wool and add the ReductoClips to the bottom of the joists.

On a Concrete Ceiling - We can fix the ReductoClips directly to the ceiling.

Floors

If the drum room is situated in a house or building with rooms below, then there are a couple stages. Firstly, we need to add acoustic mineral wool under the floorboards to stop sound resonating in the void space below the floor. We then need to add mass to the floor to block the airborne sound, and a resilient layer to absorb the vibration from the kick drum. I would recommend one of our SoundMat solutions, preferably the SoundMat 3 Plus for the highest performance.

If the drum room is on the ground floor with a solid, concrete floor, then you will just need to add a mat that will absorb the vibration and stop it from transferring into the structure. I would recommend our ImpactoMat 5mm .

Doors and Windows

 These are the biggest weak spots. Ideally, if you can get away with not having any windows, this will give you the best performance. If you need natural light then use triple glazed or specialist acoustic glazing. This needs to be well fitted with no gaps between the frame and the wall.

Regarding Doors, again you need high mass material, so a heavy, dense fire door, or even a double door system would be best. Or you can add mass to your existing door by adding a layer of mass loaded vinyl to the door. Again making sure there are no air gaps between the door and frame by adding a good seal or draught excluding material. You can also purchase custom made acoustic doors which are very high performing, but these can be expensive.

  Ventilation

For ventilation we suggest using a high quality acoustic vent system .

I hope this has covered most questions, as always if you want the best advice, speak to a professional. We are happy to talk you though any problems or answer any questions.

You can call us Monday to Friday, Nine to Five on 01423 206 208 or contact us using the page below.