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Decibel is a unit used for:

Decibel is a unit used for:

  • (a) Speed of light
  • (b) Intensity of sound
  • (c) Intensity of heat
  • (d) Longitudinal time
The decibel, symbolized by dB, is a logarithmic unit of measurement for the power or loudness of a sound. It measures the ratio of a physical value, like sound pressure or power, to a reference level. On the decibel scale, 0 dB is the threshold of human hearing, and 120 to 140 dB is the level of sound that becomes painful to the ears. Because the human ear is sensitive to differences in sound levels in a logarithmic fashion, the decibel scale is a convenient unit of measurement for sound levels.
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Related MCQs:

 ‘NATO’ is an abbreviation of:

March 18, 2026 No Comments
  • (A) North Atlantic Treaty Organization
  • (B) Non-Aligned Treaty Organization
  • (C) Non-Aligned Trading Organization
  • (D) North American Transport Organization

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