ASTM E2235隔声试验方法中衰减率测定的标准试验方法
日期:2012-02-08 10:50
n is used in formulas. It is not sufficiently precise for use in situations where room sound absorption is to be used without taking logarithms.
1.3 For laboratory measurements of the sound absorption of materials and objects, Test Method C 423 should be used.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applica
5/8 下一页 上一页 首页 尾页
返回
刷新
WAP首页
网页?/a>
登录
09/04 16:30