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
method shall not be used when room sound absorption or decay rate is to be used directly to satisfy some criterion, for example in a room that must not be overly reverberant so speech will be intelligible.
Note 1The uncertainty of the room sound absorption obtained will usually be too high and additional measurements are necessary.
Any companion standard may specify the use of the procedures in this method for determining whether the decay rates in a room are slow enough to satisfy the requireme
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09/01 18:17