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... y, if the range exceeds 5 meters, although some sounds can still be heard, it is difficult to identify the sound information at normal speaking volumes.
If the volume of the target is louder, it is only because the sound waves have traveled farther, not because your own hearing has become stronger.
Using conventional speech volume as a judgment method, research shows that the hearing distance of five meters for ordinary people is almost the limit distance.
Chen Mo's curre ...
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