equivalent continuous a sound level
... 呼吸性粉尘 respirable dust 等效连续A声级 equivalent continuous A sound level 换气次数 air changes ...
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If the toy has a clearly defined operating cycle, measure the time average (the equivalent continuous) sound pressure level in each microphone position during at least one whole cycle.
如果被测玩具有明显的运行周期，至少在一个完整周期内测得每个麦克风的按时平均(均等连续)声压水平。
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