Why do you choose our acoustic panels? 1. Our foam sound panels are professional studio grade acoustical treatments, is great for voice and video recording, which can enhance the sound and speech within a room. 2. These acoustics foam wedges are effective sound deadener for standing waves and flutter echoes, especially when used with our corner bass traps and corner blocks. 3. It also reduces slap-back and room ring when these soundproof panels used in medium-sized areas like isolation booths, recording booths, control rooms, and sound studios. 4. These noise absorbing panels are ideal for spot-treating production studios, practice rooms, theaters or movie theaters, and other busy and crowded places such as gyms, subways, stations, offices, schools ect. Specification(approx): Material: high quality foam Dimension: 30 * 30 *2. 5cm (12"*12"*1") Weight: 1.91kg/ 4 pounds Color: Black Warm Tips: 1. 1" X 12" X 12" acoustic panel studio foam wedges are 1 inch in thick and covering 1 square foot. 2. Foam will not deteriorate or fall apart over time, all that you need to do is to clean the dust after long time use. Package Included 50 Pack Acoustic Foam Panels