Pyramid sound-absorbing sponge is made with a density of more than 30 high-density foam, with beautiful appearance and good acoustic characteristics; by sound waves reflected back and forth within the sponge absorbing frequencies above 500HZ low voice, reducing indoor reflection sound interference and response to improve the purity of sound. Its greatest feature is: handsome appearance and good acoustic properties, based on this design, the pyramid sound-absorbing cotton enhanced installation features, it provides a minimum of seams, which allows the installation more beautiful; pyramid shape while also provides a little extra diffusion effect, it makes you sound more dynamic. 1. opening: open cell structure in order to increase its sound absorption capacity and optimized to increase the porosity of its internal processes to ensure the sound absorption coefficient of the pyramid sound-absorbing sponge; it is a small amount of the pyramid sound-absorbing sponge in the room you can get the desired reverberation time. 2. Density: the higher the density, the stronger the ability to absorb low frequency. Pyramid sound-absorbing high-density structure of the sponge, it has a very broad absorption band, 50mm thick pyramid of sound-absorbing sponge absorbing frequencies above 500HZ can reach. 3. Uses: Widely used in interior decoration studio, recording studio, audio-visual room, audio-visual room, KTV, soundproof room, conference room, studio, studios, theaters and other occasions