Which one of the following statements is not correct ........

General Science (CDS) Physics

Which one of the following statements is not correct?

Sounds wave in gases are longitudinal in nature

Sounds wave having frequency below 20 Hz are known as ultrasonic waves

Sounds waves having higher amplitudes are louder

Sound waves with high audible frequencies are sharp

The sound waves having frequency below 20 Hz are inaudible. Ultrasonic waves are those waves which have the frequency of above 20,000 Hz.

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