Talk:The Saddest of All Keys/@comment-67.188.85.240-20180202235056/@comment-33382851-20180203093203

The range of frequency that cannot hurt or kill you is 20 Hz to 20000 Hz

That is Audible Sound Frequency. If it is Infrasonic (below 20 Hz) or Ultrasonic (above 20000 Hz), it can hurt or kill you because the frequncies aren't fit to your ears.

This is your science lesson with Neverlosehope aka Diego_25 :>