It is said the magic cellphone ringtone, with a frequency of above 8000HZ, can only be heard by people under the age of 25, whose hearing of high frequency sounds have remained unimpaired.

  • 这种铃声的频率在8000赫兹以上,据说只有25岁以下的人能听到,因为青少年的高频听力还没受损伤。
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