The sound produced by the vacuum cleaner amounts to about 68 decibels, equivalent to the noise level of a normal conversation.
这种吸尘器制造的音量大约在68分贝，相当于稍微大声点的普通谈话音量。
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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