Question

Define ultra and infrasonic sounds.

Answer 1

(1) Audible waves

Audible waves are waves that lie within the range of sensitivity of the human ear. They can be generated in a variety of ways, such as by musical instruments, human vocal cords, and loudspeakers.

(2) Infrasonic waves

Are waves having frequencies below the audible range. Elephants can use infrasonic waves to communicate with each other, even when separated by many kilometers.

(3) Ultrasonic waves

Are waves having frequencies above the audible range. Ultrasonic waves are used in medical imaging.

Answer 2

Ultra is above 20khz
And infra is below 20hz
Hope it helps