Why are humans unable to hear ultrasound?

Answer 1

You cannot year infrasonic and ultrasonic waves because their frequencies are beyond Êthe normalÊrange ofÊÊwhich human ear can hear.ÊInfrasonic waves has frequencies Êfar below the range ÊofÊhuman being hearing while ultrasonic waves have frequenciesÊabove the range of human being hearing.Ê

Answer 2

Because if its too low or too high, our ears arn't sensetive enough to hear the sound. Ultrasound is called "ultra" sound because it is beyond the normal range of human hearing in the same way that ultraviolet light is beyond violet light and outside the normal range of human vision. While ultrasound has frequencies above the range of human hearing, infrasound has frequencies below the range of human hearing, in this case just as infrared light has frequencies below those of red light, and therefore outside the normal range of human vision.

Answer 3

Because our sense of hearing doesn't notice it.... it is beyond (ultra) our ability to hear.

Answer 4

Because when sound waves get higher, the wave lengths get shorter, faster, and closer together, and our ears are not able to pick them up, its also why we are in able to hear underwater.

Answer 5

For the same reason the grass is green and giraffes have long necks. Humans evolved without that ability, almost surely because it wasn't useful to early man's survival.