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。