Multiple choice

There are 3 sound sources producing sounds of 20 dB, 40 dB and 80 dB. Which sound will we hear the loudest?

  1. 20 dB

  2. 40 dB

  3. 80 dB

  4. All the 3 sounds will be equally loud.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The loudness of a sound depends on its amplitude. When the amplitude of vibration is large, the sound produced is loud and vice-versa. The loudness of a sound is expressed in decibels. Hence, the sound with a higher decibel will be heard louder.

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