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。
Melatonin is a supplement that works in harmony with your natural sleep cycle to support a sound, tranquil night's sleep so you can awaken refreshed.
补充退黑激素帮助维持规律的睡眠模式，夜间宁静的入睡，早晨醒来会感觉活力充沛。
Melatonin is a supplement that works in harmony with your natural sleep cycle to support a sound, tranquil night's sleep so you can awaken refreshed.
补充退黑激素帮助维持规律的睡眠模式，夜间宁静的入睡，早晨醒来会感觉活力充沛。
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