Used to improve the acoustics of semi closed spaces to make music more coherent and intelligible beautiful.

These are surfaces where partial absorption is inherent in the design, and any reflected sound is dispersed. In hybrid surfaces, wavefront dispersal is made via a spatial distribution of impedances, which is achieved by patches of absorbing and reflecting material. These surfaces are hybrids somewhere between pure absorbers and nonabsorbing diffusers....

The protocol is to use a binary sequence for the holes that tries to keep the number of ones and zeros even, which helps more uniform distribution of the diffuse reflected sound. Hole spacing was originally inspired by Angus' work on MLS (Maximum Length Sequences). Optical sequences usually result in too few 1s in long seuences, and some calculations are likely to result in too many 1s. Generating a familiy of sequences and looking for optimized strings with even numbers of 1s and 0s is necessary.

The absorption material used on the back have the same density, equal distributed on entire panel surface....

The material density is 120kgm3.

Absorption capacity are 10 times bigger that mineral wool....that's why I think is best material to be used it on diffusers...


The range frequency is on 800-1000khz area...