This International Standard specifies standard procedures and guidelines for acoustic testing to determine the ability of a specimen to withstand the particular sound pressure level environment to which it is exposed or susceptible to exposure.
JIS C 60068-2-65:2006 Referenced Document
ISO 266:1975 Acoustics; Preferred frequencies for measurements
JIS C 1509-1:2005 Electroacoustics -- Sound level meters -- Part 1: Specifications