Question

PLEASE HURRY
David Fee studies sound waves so deep and low that humans cannot hear them. What are these low frequencies called?

A. infrared
B.seismology
C.geosound
D. infrasound

Answer 1

Answer:

Infrasound

Explanation:

Infrasound, sometimes referred to as low frequency sound, describes sound waves with a frequency below the lower limit of audibility.

Answer 2

D is the answer it just makes the most sense