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NDA 2022 GAT · General Knowledge · Sound and Waves · easy

The unit decibel is used to measure

Single correct option

The unit decibel is used to measure
  1. A. frequency of sound
  2. B. speed of sound
  3. C. pitch of sound
  4. D. loudness of sound
Show answer and solution

Answer: (D) loudness of sound

The decibel is a logarithmic unit for loudness (sound intensity level). Frequency is measured in hertz, and speed in metre per second. Pitch depends on frequency, not on the decibel scale.
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Original question written in the NDA 2022 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake