If the frequency of sound lies between 20 $H z$ and 20000 $H z$ , it is known as __________ sound.

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Solution

A sound that lies in the range of 20 $H z$ to 20000 $H z$ is called audible sound.
Human ears can only hear the sound which lies in this range.
Hence, if the frequency of sound lies between 20 $H z$ and 20000 $H z$ , it is known as audible sound.

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If the frequency of sound lies between 20 Hz and 20000Hz , it is known as __________ sound.

A sound that lies in the range of 20Hz to 20000Hz is called audible sound.Human ears can only hear the sound which lies in this range.Hence, if the frequency of sound lies between 20 Hz and 20000Hz, it is known as audible sound.

If the frequency of sound lies between 20 $H z$ and 20000 $H z$ , it is known as __________ sound.

A sound that lies in the range of 20 $H z$ to 20000 $H z$ is called audible sound.
Human ears can only hear the sound which lies in this range.
Hence, if the frequency of sound lies between 20 $H z$ and 20000 $H z$ , it is known as audible sound.