ASTM E3222-20a 高频冲击声额定值测定的标准分类.pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards Guides and Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:E3222-20a INTERNATIONAL Standard Classification for Determination of High-frequency Impact Sound Ratings1 This standard is issued under the fixed designation E3222:the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon (e)indicates an editorial change since the last revision or reapproval. 1.Scope Ceiling Assemblies and Associated Support Structures 1.1 This classification provides methods for calculating E2179 Test Method for Laboratory Measurement of the single-number ratings of high-frequency impact sound Effectiveness of Floor Coverings in Reducing Impact transmission based on one-third-octave-band impact sound Sound Transmission Through Concrete Floors pressure levels generated by the s...