Sound Barrier and Acoustical Properties of AAC

Autoclaved Aerated Concrete is an excellent sound insulator. The millions of tiny air pockets and the uniform cellular structure of AAC inhibits the transfer of sound. An 8-inch AAC wall has a Sound Transmission Coefficient (STC) of 50. It has been found to provide up to 7dB higher sound absorption due to this cellular structure when compared to regular concrete or other materials of similar mass.

Hotels, multi-family housing, residence halls, and hospitals have benefited from this unique property. Few materials can offer the sound suppression qualities of AAC when it is used as a party wall system or a building envelop.