Custom Audio Designs Ltd 

Acoustic Diffusers | Sound Diffusers | Diffusion Panels | Sound Scattering Panels

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  • 156 distinct phase blocks.
  • Recording Studios.
  • Post Production Studios.
  • Practice Rooms.
  • Home Theatres.
  • Mastering Studios.
  • Various Paint Option Finishes.
  • Lightweight.
  • Hardwearing.
  • 120mm or 150mm depth options.


  • Interfering reflections can be controlled by absorption or diffusion.
  • In small rooms, it is often desirable to control interfering reflections and provide an ambient sound field using diffusion instead of absorption.
  • When the room’s surfaces are relatively close to the listener, a very efficient diffusing surface is needed.
  • The Skydiff scatters incident sound uniformly so that the acoustic glare in all directions is minimized.
skydiff diffuser

Problem and Solution


Small rooms like Project Studios need a very efficient surface to diffuse interfering rear wall reflections and provide a diffuse sound field.


To solve this problem, the skydiff utilises advanced primitive root number theory to produce the most powerful and aesthetic two dimensional omnidirectional diffusing surface in the acoustical industry.


skydiff Diffusion Coefficient Graph


The uniformity of diffusion is characterized by the standard deviation of the 1/3 octave polar response, for a given angle of incidence. For each of the 37 angles of incidence, 37 backscattering impulse response measurements are made at 5° increments between 0° and 180°. The Diffusion Coefficient is the mean standard deviation for all angles of incidence, normalized to the standard deviation of a delta function (1 equals ideal diffusion). The data illustrate the exceptional uniformity of diffusion above the diffraction limit (565 Hz = 1130 ft/sec/2'), which is related to the 2' dimension of the panel. The Diffusion Coefficient of a flat reflective panel is shown for comparison.

skydiff Absorption Coefficient Graph


The expanded polypropylene / EPS mix material of the skydiff provides useful low frequency absorption.


The skydiff is very easy to install on walls or ceilings using a suitable silicone adhesive. Be sure to apply all skydiffs in the same orientation.

We now have a thinner version of the skydiff which is only 120mm deep. Please note that the pictures below show painted units which is an optional extra and must be requested at the point of order.


All information contained in these details is given in good faith but without warranty.
Custom Audio Designs reserves the right to alter the specifications of any product without notice.
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