New ASTM ratings for quantifying low and high-frequency impact insulation in laboratory testing

The authors have recently published [J. Acoust. Soc. Am. 141, pp. 428–440 (2017)] a two-rating method for evaluating impact sound insulation, in which the low and high-frequency components of the floor are evaluated independently. Although originally described for field testing, the ratings can be applied to laboratory testing. ASTM draft classifications have been submitted for low and high-frequency versions of Impact Insulation Class, named LIIC and HIIC, respectively. The scope and use of the new ratings are explained.