SGRI developed an acoustic toolkit for measuring and calculating the Apparent Sound Transmission Class (ASTC). This toolkit aims to validate the performance of SGRI's acoustic solutions across various project sites throughout India.
Saint-Gobain Research India (SGRI) engaged NV Dynamics to perform ASTC assessments in three partition walls using the ASTM E336-19 standard at their facility in IIT Madras Research Park.
ASTC assessments were conducted across 2 sets of rooms separated by a common partition. A qualified 10-inch speaker was mounted on a rigid tripod to avoid structural excitation and placed in a corner of a source room away from the partition wall under consideration. Pink noise was played through the speaker and a uniform reverberant sound field was built within the source room. Noise levels within the source room were measured at multiple locations as per the guidelines of the reflecting planes, node and anti-node points and distance from the sound source itself.
Numerical calculations were carried out to obtain the transmission loss values and using the curve fitting method, appropriate ASTC value was assigned to each tested partition.