AVE IsoPyramid Pyramid Acoustic Foam Pack The IsoPyramid acoustic foam panels are specially designed acoustic foam panels that help to deflect and absorb troublesome audio frequencies. Each 400 x 400mm panel features a 20 mm thick base with a 30mm high pyramid and is ideal for reducing standing waves in your audio environment. Supplied as a pack of 10 this product is perfect for treating your studio, recording suite, home theatre, and any other audio environment that could benefit from acoustic treatment.