Acoustics: Name for sound below the human hearing threshold. Sounds with frequency lower than 20 Hz are termed as what? Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
-
AInfrasonic (infrasound)
-
BUltrasonic
-
CAudible
-
DSupersonic
Answer
Correct Answer: Infrasonic (infrasound)
Explanation
Concept
- Human hearing ≈ 20 Hz to 20 kHz.
- < 20 Hz: infrasound; > 20 kHz: ultrasound.
Final AnswerInfrasonic (infrasound)