wooden Sound Diffuser


 The sound diffusion is unfortunately neglected as an acoustic measure. It is diffusion of the effect and implementation, much more "relaxed" and easier,
as absorption. In contrast to absorbers, too many diffusers can not be used even without measurements, and as a result errors in the acoustic optimization can be made.

Diffuser QRD 7 folded / listening room space-saving acoustics
A diffuser should disperse the incident sound as evenly as possible. Although sound descriptions are always subjective, diffusers increase the liveliness and
 spaciousness of many listeners. The sound is more believable, softer, more natural and less "sharp" in the higher frequency range. The best possible
uniform distribution of the sound field brings the "analog" into the sound.

Diffused scattered the time course of the reverberation is less of individual discrete / sharp reflections, but from many who decrease evenly in their intensity.
The resulting fragmentation of the previously bundled reflections has little to do with the overall length of the reverberation. As long as a diffuser does
 not act as an absorber through porous material (e.g., Styrofoam / EPS), or resonates with too thin plywood, the reverberation time remains nearly
unchanged. This point is often misunderstood in the diffusion:

• The basis of the room acoustics remains the reverberation time created by the absorbers. However, the length of the reverberation time says
nothing about the quality of the composition of the reverberation. •

The statement "The ratio of absorption to diffusion must be right" is a persistent myth. Since the absorption is limited, the diffusion would
 have to be limited accordingly. For the remaining areas correspondingly smooth walls would be the acoustic optimum! A listening room equipped
with many diffuse scattering surfaces does not lead to a "diffuse sound mash", but to a more even distribution of the sound intensity in the room.
Diffusers, like a loudspeaker, can not add extra sound energy to the room. The quality of the existing reverberation is improved, the reflections
arrive chopped and later on the ear. The effect of a wrong directional localization caused by strong discrete reflections
 (phantom sound sources) is reduced. The temporally even decreasing reverberation flag is perceived as more natural and pleasant.

The positive influence on the acoustics is due to changes in the time domain, the intensity and the direction.
Often in diffusion only the icing on the cake of the room acoustics is spoken, which I think is a mistake. Almost all sound engineers confirm the positive
 influence of diffusers and like to use them. Even classical music halls are not only for visual reasons with numerous decorations provided.
The "White Skin" of the Hamburg Elbphilharmonie is an extremely large-scale diffuser and proves that such a room can also sound very clear /
detailed / analytical. A good diffusion of a listening room makes a really relaxed listening to music possible. You do not drink gin and tonic

without ice. A good sound diffusion is therefore at least as important for a first-class music reproduction as the absorption.
Disadvantages are undoubtedly the not inconsiderable costs for good diffusers.


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