Acoustic Diffuser

QRD67

Acoustic diffuser prevents unwanted sound wave reflections in the listening space. Intended for demanding hifi listeners, it improves the overall acoustics of the listening space. Instead of absorbing the sound waves, as usual isolation does, they are evenly diffused.
The main advantage rests in filling the listening space with sound without unwanted linear reflections from flat surfaces.
The diffuser should ideally be placed between the speakers in such a way that its centre point matches the centre point of the wall height.
Upon customer’s request, an inverse diffuser can be made. The inverse one is placed right behind the listener so that the two are directly opposite each other. Their effect of diffusing unwanted reflections then multiplies.

Parameters

  • Diffusion from: 345 Hz
  • Number of points N: 67×67=4489
  • Panel depth: 25 cm
  • Minimal distance from the listener: 1.4 m

Dimensions

  • Height and width: 168 cm
  • Depth (including the rear plate and anchoring): 32 cm
  • Finish: Natural. Price: €4 600.

The Milk Glass Effect

Using the acoustic diffuser has a similar diffusing effect on the sound as sandblasted milk glass does when placed in front of a light cone. Milk glass evenly disperses, or diffuses the light beams. The exact same effect of evenly and regularly dispersing sound is achievable with an acoustic diffuser.

Acoustic Diffuser—Theory, History

The formula for the calculation of the diffuser shape is based on quadratic differences of sequences from the elementary number theory, as described by the mathematicians A. M. Legrand (1752–1833) and C. F. Gauss (1777–1857). The 2D-QRD quadratic diffuser has excellent efficiency, its behaviour is countable and it works in both horizontal and vertical planes.