Multiple choice general knowledge science & technology

Two 90-decibel sound sources are turned on at the same time. Together they create a 180-decibel sound level.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Decibels use a logarithmic scale, so adding sound sources doesn't add decibel values linearly. Two identical 90 dB sources combine to approximately 93 dB, not 180 dB.

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