24PCS Self-Adhesive Acoustic Panels,1X12X12Inch Sound Proof Foam Panels,for8898
If part of the acoustic foam can not fully expand, you only need to soak it in water for 3-5 minutes, ventilate it to dry for about 24 hours, be to expand to the normal size. Therefore, they effectively reduce reverb, flutter echoes, undesirable acoustic reflections, unwanted noises.