If one PC creates a noise level of 20dB and another makes 40dB of noise, roughly how much louder is the second computer?

Two times louder

Four times louder

Eight times louder

Ten times louder

Choose wisely! The correct answer, the explanation, and an intriguing story await.

Here's the story behind it

The decibel (dB) scale is logarithmic, not linear, increasing by a power of ten with every 10dB, which roughly equates to a doubling in loudness based on average human hearing. Consequently, 30dB is about twice as loud as 20dB, and a computer producing 40dB of noise would be approximately four times louder than one generating 20dB.

A PC emitting only 20dB of noise would be considered a relatively quiet system, while a typical office environment is around 40-50dB, and comfortable hearing levels are said to be below 60dB. A siren 10 meters away and speakers at a rock concert measure around 110dB, heavy weapons and space rockets register at 180-190dB, and at 194dB, sound waves become shock waves.

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