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Question

(a) What is the upper limit of frequency of human hearing ?

(b) What is the lower limit of frequency of human hearing ?

(c) Name one animal which can produce ultrasonic sounds.

(d) Name two animals which can hear ultrasonic sounds.

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Solution

a)20,000 Hz
b)20 Hz.
c) Bats

Bats use ultrasound instead of their eyes to find their way around in darkness and catch insects. However, not all bats have the same dexterity in echolocation, and some species are better at it than others.
d)Dogs, cats, dolphins, whales, bats, and mice can all hear ultrasound



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