What is sound frequency?

Q7. What is sound frequency?
Ans. Some sounds, like a car’s squealing brakes, are very high -pitched. Others, like a booming dash drum, are very low- pitched. What makes them different is the frequency of the sound waves. If the sound waves follow very rapidly one after another, they are high- frequency and make a high sound. If there a long gaps between each wave, they are low- frequency and make a low sound. A law frequency sound is about 20 Hz or waves per second. A high frequency sound is 20,000 Hz or waves per second.

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