Why can't we hear the scream of bat?

Because its scream consists of infrasonic sound

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Because its scream consists of ultrasonic sound

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Because its scream consists of subsonic sound

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None of these

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Solution

The correct option is D Because its scream consists of ultrasonic sound
Bats produce ultrasonic sound and thus humans cannot hear them. Bats emit sound in the range of $20, 000$ to $100, 000 H z$ which is beyond our audible range.

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