This should look like an empty drawer and the boards should be around half an inch thick. This can also be a back-plate and separate sides that you glue together. A wooden cabinet or frame with a backboard and four sides.Spray paint (purely for aesthetics – optional) Material needed for a QRD:.The supplies needed depend on the type of diffuser you are making but the tools are the same for each. Once you have the calculations for your environment and the frequencies you want to diffuse you can begin constructing your DIY sound diffuser. Make sure you copy/ save/ print out the grid or guideline generated by the app or software you use to get the diffuser calculations as these are important for the construction step. This calculator tells you the diffuser width, max column length and column width alongside a numbered grid for you to follow. You can also use someone else’s measurements if they match the frequencies you are trying to diffuse.Īs an example, here is a handy Skyline Diffusor calculator. You can then use the calculated figures to determine the shape and depth needed in your diffuser. This will help you calculate the frequency range within the room. You can do this quickly and easily by using a frequency calculator computer program or app. Once you know which type of diffuser you want to create, you can calculate the frequency range. Calculate the frequency range you want to diffuse Once the calculations are complete a skyline diffuser is very easy to make. The calculation required to make an effective skyline diffuser is more complicated than a QRD but putting it together is straightforward. This diffuser is technically a 2D QRD but is a popular type within its own right.Ī skyline diffuser appears to be random and when complete it resembles a cityscape, hence the name. If the diffuser is for a smaller space then a two-dimensional QRD is a suitable option. Two-Dimensional Quadratic-Residue Diffusers (2D QRD)Ī 2D QRD is slightly different from a QRD as you glue the towers directly to a side-less backboard. This type tends to be most effective when there is about 6 feet between you and the diffuser making it a great option for larger rooms. Making a DIY QRD is relatively simple and straightforward. They are usually great for low-mid frequencies. You can make a QRD diffuser using columns or squares. There are a few types of diffusers to consider: Quadratic-Residue Diffusers (QRD)Ī QRD uses symmetrical positioning of the walls to scatter different sound frequencies. The other thing to think about is what type of diffuser you want to build. Try to find where the reflection points are on your wall in relation to the speakers/ sound source. The placement will depend on the shape of the room and the location of the sound source. Once you’ve decided on the material, think about how big you would like the diffuser to be and where you are going to place it. Popular options include plywood, pine, cherry or alder wood. Wood is robust, easy to build with and offers great acoustic properties.Īny wood will work, it depends on the final look you want to achieve. The preferred material for DIY sound diffusers is wood. Planning: Material & Placementīefore you start gathering material take some time to plan what material you want to use and where the diffuser needs to be located. However, this is down to personal preference and the sound you are aiming to achieve within the room.Īs you will soon see, a DIY diffuser is not only functional it is also fun to build and the end result is stylish. It is common for diffusers to be used alongside sound absorption panels as well as bass traps. It gives the room a sense of spaciousness without the distortion or echoes that come with it. It does not absorb the sound, this helps to preserve the sound energy in the room and keep the liveliness of the sound. What is a Sound Diffuser?Ī sound diffuser is used to disperse sound energy by altering echoes and reflections. This step by step guide will help you build your very own sound diffuser.Ī DIY sound diffuser is effective, functional and looks great when wall-mounted or hung from the ceiling. The downside to diffusers is that they can be expensive and it is sometimes hard to justify the cost.įortunately, you can build them yourself for just a fraction of the price. A sound diffuser reduces echoes and reflections in a room by scattering the sound waves in many directions.
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