Q11 of 29 Page 180

Which has larger frequency – infrasonic sound or ultrasonic sound?

Ultrasonic sound have higher frequency than infrasonic sound. Because Infrasonic sound are the sound waves with frequency less than 20 Hz (hertz).While Ultrasonic sound are the sound waves having frequency higher than 20 kHz. The figure below depicts more clearly the frequency range of infrasonic and ultrasonic sound waves.



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