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When we change feeble sound to loud sound we increase its 

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Important Questions on Sound

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Explain how, bats use ultrasound to catch the prey.
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What is meant by ultrasonography?
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Name the sound waves used by bats while flying in the dark.
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What name is given to the sound waves of frequency too high for humans to hear?
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What are ultrasonics? Can you hear the ultrasonic sound?
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What are ultrasonic waves?
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How is it that bats are able to fly at night without colliding with other objects?
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Explain how a bat catches its prey in the dark.
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Animals like dolphin produce
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Explain how ultrasound can be used as an effective cleaning agent.
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What name is given to the sound waves of frequency too low for humans to hear?
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How does a bat make use of ultrasonic waves to find its way?
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Sound whose frequency is below 20 Hz is called _____.
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What name is given to sound waves of frequencies higher than 20 kHz?
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What is infrasound? Name some animals communicating through the infrasound.
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Give an example of an object producing infrasonic sound.
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Name two animals which can hear sounds with frequency beyond 20000 Hz.
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Which animal does not use the method of echolocation?
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Define infrasonic sounds.
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What are infrasonics? Can you hear them?