Question

Sound waves with frequencies below the normal human range of hearing are called __________ waves.



Choose one answer.





a. infrasound







b. ultrasound







c. resonance

Ultrasound??

Answer 1

infrasound. :-) ultrasound is higher frequencies than hearable. dogs can hear parts of the ultrasound spectrum.

Answer 2

oh yea : ) im thinkin now

Answer 3

Generally speaking, you'll find infra- means “under” or “below” and ultra- means ”bigger than” or “above”.