In terms of loudness, bats emit calls as low as 50 dB and as high as 120 dB, which is louder than a smoke detector 10 centimeters from your ear.

 
  • 关于音量,蝙蝠发出的叫声低至50分贝,高达120分贝,这比距离你耳朵10厘米处的烟雾探测器所发出的声音还要响。
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