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[SOLD] QRD Panels - Wood Acoustic Diffuser

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[SOLD] QRD Panels - Wood Acoustic Diffuser

Post by Ammar Mariti on Wed Apr 12, 2017 10:38 am

6 Well Quadratic Residue Diffuser
Prime number 7 design (1, 4, 2, 2, 4, 1 config)
Approximate frequency range: 969 - 1937 Hz
Good for negating flutter echoes

2 feet x 2 feet x 4 inches
Pine wood with plywood backing

What is an Acoustic Sound Diffuser?
Sound diffuser is an acoustic treatment device for scattering or diffusing of sound energy to reduce flutter echo and comb filtering. When sound bounces or reflected off a flat and hard surface, the reflected energy level is almost similar to the state before it hits the hard surface, and travels in the same composition but opposing direction. As a result of this reflected sound, standing waves and flutter echoes are created and interfere with the original sound produced. This distort sound clarity.

With a sound or acoustic diffuser, the reflected sound is scattered in all direction, thereby diffusing the sound energy without removing it from the environment. Hence, sound clarity is maintained and improved acoustics. For example, in a control room diffusers are generally place onto real wall behind the listening position to reduce reflection from that wall and make the room more lively and sound larger than it really is.

Sound Diffusion vs Absorption
The difference is in the preserving of sound energy within the environment. Sound diffuser don’t absorb sound, they simply disperse the reflected sound waves, distributing the sound energy within the room. For this reason sound diffusers are made of hard materials with corrugated surfaces that are meant for breaking up the sound reflection. Since diffusers don’t absorb sound, you get almost the same amount of energy as it’s been produced.

Whereas, sound absorption is basically the “soaking up” of sound energy. Sound absorbers are typically made of acoustic foam and mineral wool, such as Aurlex’s Studiofoam and Rockwool fiberglass board. Sound absorption is necessary for removing the unpleasant “glare” in sound or bright sound that usually happen on high frequencies. Low frequency sound energy absorption is in bass trapping which frequencies can be down to as low as 40Hz. Acoustic panels are great for mid to higher frequencies in acoustic sound absorption as it can also help in reducing standing waves and flutter echoes.

2 pairs available

Selling because my friend cancelled and I'm moving.
Contact Ammar 0164358364
COD Cyberjaya.

Last edited by Ammar Mariti on Wed Apr 19, 2017 3:49 pm; edited 2 times in total (Reason for editing : wrong price listed as per pair not per piece.)

Ammar Mariti
New Member
New Member

Number of posts : 5
Age : 28
Location : Cyberjaya
Registration date : 2014-11-04

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