There's even a "calibration" feature that lets you hold the phone in a specific distance while playing the alarm and helps you figure out the optimal volume.

软件甚至还提供了“校准”的功能，能够一边按照设定播放闹铃，一边让您将手机放在不同的位置，以帮助您找到最合适您的闹铃音量。

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Figure 2 (below) shows a typical calibration report.

图2是一个典型的校准报告。

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