infrasound

As nouns the difference between infrasound and ultrasounds

is that infrasound is (physics) sound waves having frequency below the human audible range (below about 20 hz) while ultrasounds is .

As nouns the difference between infrared and infrasound

is that infrared is electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm while infrasound is (physics) sound waves having frequency below the human audible range (below about 20 hz).

As an adjective infrared

is having the wavelength in the infrared.

As a noun infrasound

is (physics) sound waves having frequency below the human audible range (below about 20 hz).

As an adjective hypersonic is

(of a speed|aviation) equal to, or greater than, or capable of achieving, five times the speed of sound.

As a noun infrasound

is (physics) sound waves having frequency below the human audible range (below about 20 hz).

As an initialism elf is

(a radical environmentalism group).

As nouns the difference between taxonomy and infrasound

is that taxonomy is the science or the technique used to make a classification while infrasound is (physics) sound waves having frequency below the human audible range (below about 20 hz).

As a noun infrasound

is (physics) sound waves having frequency below the human audible range (below about 20 hz).

As an adverb infrasonically is

by means of infrasound.

Infrasonics is a related term of infrasound.

As nouns the difference between infrasonics and infrasound

is that infrasonics is the study, and the application of infrasound while infrasound is (physics) sound waves having frequency below the human audible range (below about 20 hz).