Сòòò½APP

Our architectural acoustics experts operate an A2LA accredited facility equipped with reverberation chambers that allow assessing the performance of absorption materials, such as: 

• Acoustic wall panels
• Baffles
• Ceiling panels
• Draperies
• Fabrics
• Highway and transportation barriers
• Insulation materials
• Office partitions
• Window fashions

We measure sound absorption by measuring the decay rate in a reverberation room. Materials receive two different ratings: Noise Reduction Coefficient (NRC), the average of sound absorption coefficients at frequencies of 250, 500, 1000 and 2000 Hz rounded, and Sound Absorption Average (SAA), a single number rating that uses the rounded sound absorption coefficients at the twelve one-third octave bands from 200 through 2500 Hz indicating the ability of a material to absorb sound.

• Doors
• Draperies
• Fabrics
• Glass
• Highway and transportation barriers
• Insulation material
• Wall panels and assemblies
• Windows and window fashions

We measure sound transmission loss through the Sound Transmission Class (STC) and the Outdoor/Indoor Transmission Class (OITC). STC is defined as a single number rating that is calculated using values of sound transmission loss (TL), providing an estimate of the performance of a partition. OITC relates to ground and air transportation noise like planes, trains, and cars, and provides a single number rating for building facades and facade elements like windows and doors.

Сòòò½APP's field testing is conducted to measure the airborne sound-insulating properties of wall, ceiling and floor assemblies and the impact sound isolation between rooms. Our services help architects, building officials and construction contractors to meet building code requirements.