Painéis de espuma acústica, painéis acústicos em forma de cunha acústica preta, painéis de parede acústicos de 12 x 12 x 1,18 polegadas, material de alta densidade, absorve ecos

Note: If the sponge does not inhale and rebound after opening the package, soak it in water, wring it out, and let it sit for 3-5 min Features: 1. Effective Sound Processing Foam Boards: Sound Insulation, Sound Absorbing Foam (especially High and Mid Frequency), Elimination of Sound Response and Unwanted Reverb Control Foam, Reverb Foam Board. 2. [Noise Reduction] This foam can absorb the noise of 125-1500Hz in daily life. 3. Improve the acoustic performance of the instrument. 4. Made of high-qu