DIY Sound Diffusers: Great Method to Make Skyline Diffusers!

DIY Sound Diffusers


You might remember sound diffusers out of your high school band practice—perhaps you set egg cartons on the wall, or randomly chopped up blocks of cloth. In any case, muffling sounds often does not look easy.

That is not true for those who use a skyline diffuser. Created from totally different measurement blocks of wood all stuck collectively, the purposeful wall decoration appears like, you guessed it, a metropolis skyline. It might be a cool factor to hold in your wall even when it wasn’t so good at diffusing sound waves.

Have you learned that over 90% of rooms have poor sound diffusion and you may construct your personal acoustic diffuser to unravel that acoustic distortion residing in your room? Do you know that sound of useless lifeless air hovering within the room, not moving? It’s that dry and brittle sound that comes from an excessive amount of absorption. It’s a “dead room” as the acoustic engineers name it.

Check our article on acoustic panels here!

When you’re outside in a free area with no buildings or something around you, you hear sounds coming from all over the place. Sounds are all around and in front of you, behind you, and left and right. That is the sound of correct diffusion. That is the sound technology you should have in your room.

Why should the sounds in your room be totally different than the sounds you hear outdoors? Let’s take the room away, so you’ll be able to hear everything, all over the place in your room. How will we obtain pure outdoor sound diffusion inside your house theater, listening, and professional recording studios? Acoustic treatment of course!

skyline diffuser cool

If this DIY process seems too complicated for you, check our Top 3 picks from Thomann on diffusers!

Hofa Diffusor
Hofa Diffusor
  • Dimensions: 500 x 500 x 110 mm
  • 36 Internal divisions, each 8 cm x 8 cm
Vicoustic Multifuser
Vicoustic Multifuser DC2 black
  • Dimensions per piece: 595 x 595 x 147 mm
  • Set of 6 pieces
Vicoustic VicPattern
Vicoustic VicPattern Ult Wavewood White
  • Dimensions: 595 x 595 x 50 mm
  • Set contains 3 pieces of VicPattern Ultra Wavewood

What’s Sound Diffuser?

What’s a sound diffuser? it’s a gadget to handle reflections and make our small rooms sound bigger by utilizing psychoacoustics. They work in numerous sound fields by taking a “bigger” reflection that strikes it and breaking that reflection right into a collection of smaller reflections. This process reduces the brain’s capacity to localize bigger quantities of energy because it reflects off of our wall surfaces by breaking the energy up into smaller octave bands.

This process could be achieved using many diffusers throughout the offending surface area. Care should be taken in the materials you use to construct your DIY sound diffusers together with the type, quantity to build on your usage, and the place to position them inside your room.

Each room utilization is totally different within the treatment sorts you use. A control room has totally different necessities than a live room. A vocal room has totally different necessities than a live room. Many variables should be thought about and designed for.

two diffusers

How a Sound Diffuser Works

A diffuser is designed based mostly on a mathematical system involving prime numbers. As an alternative to making confusion about diffusion, perceive that a diffuser scatters soundwaves over a 180-degree angle. It makes use of wells or towers in a pattern of differing depths, heights, widths, and spacing calculated to create excellent soundwave scattering.

The depth or peak of the well or tower is derived from the quarter wavelength rule, and the width is a half wavelength. By controlling the 2 dimensions of horizontal and vertical, wavelengths from low to high vary could be subtle in a managed, predictable method. This may influence the timing, direction, and depth of soundwaves making for an extra pleasant listening experience.

If the wells or towers are not appropriately calculated and constructed, they won’t scatter the waves evenly, which is able to trigger uncomfortable listening expertise. The orientation of the pattern of the wells can also be essential to diffusion. If the wells are oriented horizontally, there’s a vertical diffusion of sound, whereas a vertical orientation creates a horizontal diffusion. Mixed and positioned appropriately, they produce better harmonics and make a room sound larger.

Sound diffuser working

DIY Sound Diffuser Placement

After getting determined to construct your DIY sound diffusers you will have to determine to position them appropriately. These calculations should be carried out before you begin the process. Diffusion placement and type to make use of are dependent upon the utilization of the room you’re inserting them in and the distances we’ve to work throughout the room.

Each prime variety of diffusion requires a certain distance to function successfully. Each room utilization requires a selection between one dimension or two-dimension. Most of the time QRD diffusers go on the back wall or behind your head and the skyline ones have the ability to be placed wherever you have needed to apply diffusion on the sound. Below we will provide you with one way to create your own QRD diffusers to use for your mixing room.

Items and Tools you need for DIY Skyline Diffuser

The most important thing when you are creating and building your own skyline diffuser is to measure the frequencies that you want to tame. After you have a specific range of frequencies that need to be addressed, then you will be able to make the calculations and find out the formula and the design for the diffuser itself.

Let’s suppose that we will need to address the frequencies from 850Hz to 4500Hz. Here is an online calculator where you will be able to insert your frequency range and you will get the results and outline for your diffuser. Here are the results when we entered our “problematic” frequencies:

added frequencies
Calculation Results
Pieces needed

This result gives you the total length of wooden pieces you need to create and assemble this diffuser. It is a total of 14.88 meters of wood with a single piece being 3.82×3.82 centimeters.

Also, you will have the design of the diffuser and how many parts in 4 different lengths you will need. We are not going to calculate the 0, because that is a spot where you are not putting any piece or column as the calculator named them.

Besides the columns, you will need a base which you will glue or screw the pieces to. The result is giving us a dimension of 45.82cm to fit all the pieces on it. Once you realize the size of the diffuser, you might think it is a small size and might not do the job right. The next most common thought and step is to create several of the same diffusers and place them together on the wall to get the best outcome and cover more spots.

The best way to sort this quickly is to order the pieces from your wood-crafting store or private workshop and just assemble them on your own, or you can cut them at your own place with the dimensions this calculator will provide. The second option will take a bit more time, but the first one might be a bit more expensive, so we will leave that decision up to you.

The tools needed to create this DIY diffuser are a hammer, power drill (if you decide to use screws), wood glue, and wall hangers. The wooden items that you need to have are base plywood where you will glue and screw/nail the pieces (45.82 x 45.82) and around 15 meters of wood with 3.82 x 3.82 centimeters in dimension.

DIY sound diffuser skyline


With a bit of time spent and some artistic and crafting engagement, you will be able to upgrade the sound in your studio. The acoustic treatment is most of the time an overlooked process and many people are not taking it seriously. Believe us, it is better to spend your saved money to improve the room acoustics, than to purchase some new unit or plugin.

We know the thrill of getting new gear is higher and a confidence booster, but if your room is not treated, this hardware might not be used to its full potential. Imagine if you get $1000 studio speakers and place them in a bare-wall mixing room. You will think that you made a bad decision on the speakers when the problem lies in the room itself.

We believe that this is one of the easiest diffusers you can make by yourself and that will truly make a change in the sound of the room. If you have any other methods how to do some basic acoustic treatment with diffusers or any tips or tricks on it, please share them with us in the comment section. We wish you easy work and a successful outcome!

Here is a video on one way to make your own DIY Skyline Diffuser!

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Nikoloski is the founder and main content writer and editor of Mixing Tips. With his experience in audio engineering, mixing, and mastering for over 15 years, will provide hands-on experience and expertise in all the matters covered on this website.

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