Q.9. Who in the following can able to hear ultrasound waves at some level?

A. Dog

B. Cow

C. Cat

D. Bottlenose Dolphin

E. All of the above

Explanation

The sound waves whose frequency is greater than 20 KHz, is termed as Ultrasound. Human being can`t hear Ultrasound waves as human have audible frequencies range from 20 Hz to 20 KHz; while Dog, Cow, Cat, Bottlenose Dolphin have audible frequencies ranges from 64Hz – 44KHz, 23Hz – 35KHz, 55Hz – 77KHz, 150Hz-150KHz respectively, and all are able to hear ultrasound waves as indicated by their higher frequency ranges.

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