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Q: For humans, the audible waves are those that:
  • A. have the frequency below 20 Hz
  • B. have the frequency range between 20 Hz to 2000 Hz
  • C. have the frequency range between 20 Hz to 20000 Hz
  • D. have the frequency range between 2000 Hz
Correct Answer: Option C - The sound waves having frequency between 20 Hz to 20000 Hz are called sonic waves. The waves of this frequency are known as audible waves. The sound waves having frequency higher than 20,000 Hz are called as ultrasonic sound waves. The sound waves having frequency lower than 20Hz are known as infrasonic waves, Both the infrasonic and ultrasonic sound waves are not audible to the human beings.
C. The sound waves having frequency between 20 Hz to 20000 Hz are called sonic waves. The waves of this frequency are known as audible waves. The sound waves having frequency higher than 20,000 Hz are called as ultrasonic sound waves. The sound waves having frequency lower than 20Hz are known as infrasonic waves, Both the infrasonic and ultrasonic sound waves are not audible to the human beings.

Explanations:

The sound waves having frequency between 20 Hz to 20000 Hz are called sonic waves. The waves of this frequency are known as audible waves. The sound waves having frequency higher than 20,000 Hz are called as ultrasonic sound waves. The sound waves having frequency lower than 20Hz are known as infrasonic waves, Both the infrasonic and ultrasonic sound waves are not audible to the human beings.