With a complex manufacturing process and high cost, sound absorbing metal panels have limited applications. As a leading plastic micro-perforated sound absorbing panel (MPP), the PSA-01 uses the shut-off molding to create micro perforations on mold surface. With PSA-01, friction depletes sound; after further entering the PSA-01 cavity chamber, resonance frequency is formed to absorb surrounding sound. The PSA-01 is proven to outdo any current sound absorbing metal panels. The PSA-01 is a cost-effective optional. Easily installed by users, the PAS-01 creates a good living space.