Question

(i) Define
(a) infrasonic wave (b) ultrasonic wave.
(ii) Name two species each of animals which
can produce and detect
(a) infrasonic waves (b) ultrasonic waves.​

Answer 1

Answer:

DEFINATION

A) The term "infrasonic" applied to sound refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20 Hz. Sources of infrasound in nature include volcanoes, avalanches, earthquakes and meteorites.

B) Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.