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Sound

Question

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Explain how bats use ultrasound to catch a prey.

Solution

Bats produce high pitched ultrasonic waves which are not heard by human beings. The ultrasonic waves on striking the insect send back an echo, which is heard by the bat. As the echo is heard by the bat, it hover on the insect and catches it.

Some More Questions From Sound Chapter

For human ears, the audible range is 20 Hz to 20,000 Hz.

State True or False:

The lower the frequency of vibration, the higher is the pitch.

State True or False:

Unwanted or unpleasant sound is termed as music.

State True or False:

Noise pollution may cause partial hearing impairment.

Time taken by an object to complete one oscillation is called __________.

Loudness is determined by the __________ of vibration.

The unit of frequency is ________.

Unwanted sound is called _________.

Shrillness of a sound is determined by the _________ of vibration.

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