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You are trying to overhear a juicy conversation, but from your distance of 18.0m , it...

You are trying to overhear a juicy conversation, but from your distance of 18.0m , it sounds like only an average whisper of 40.0dB . So you decide to move closer to give the conversation a sound level of 70.0dB instead.

How close should you come? __ cm

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