WBCS.LIVE practice question

Which unit is used to measure the intensity of sound?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Hertz
  2. Watt
  3. Joule
  4. Decibel

Correct answer and explanation

Correct answer: Decibel

Explanation: āœ… Correct Answer: D) Decibel šŸ“š Explanation: The decibel (dB) is a logarithmic unit used to express the ratio of a physical quantity, usually power or intensity, relative to a specified reference level. In acoustics, it measures the loudness or pressure level of sound waves. A whisper is typically around 30 dB, while a jet engine at close range can exceed 140 dB, which is the threshold of pain.