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decibel

decibel

22 4.7
A unit that measures how loud a sound is
  • noun
  • /ˈdɛsɪbɛl/
  • Specialized
translation icon : decibelio
  • Changes in sound level of only a few decibels can elicit substantial animal responses.
  • decibel level
  • decibels (dB)
  • 90 decibels

So maybe you can remember back to the very first of my lectures where we had the decibel demonstration, we changed decibel levels.

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Examples

  • Budell said the train transmitted about 90 decibels as it crossed the long steel switch.

    Academic text (2002)
  • How loud is a male fruit fly's mating call? "About 50 decibels at 2 centimeters," says Foreman.

    Academic text (1996)
  • So it's much louder as you can hear the decibel levels for this.

  • Or make any other high decibel noises near me.

  • Or make any high decibel noises while near me.

  • But can you maybe drop it down a few decibels, please?

  • The research team has enhanced sensitivity by 10 to 20 decibels using these techniques.

    Academic text (1994)
  • "Princess Ella's cheeks turned even rosier, and she raised her voice maybe five or six decibels."

    Fiction book (1999)
  • One hundred twenty decibels: head-on collision of a 54 Ford pickup and a 64 Chevy station wagon.

    Fiction book (1990)
  • The noise from the concert reached a maximum of 120 decibels, making it difficult to have a conversation.

Synonyms

dB
vsdecibel
  • Specialized
5 4.9

A unit used to measure how loud a sound or how strong an electrical signal is

is the same unit defined as one tenth of a larger unit

Surface Forms

decibel singular
decibels plural

Morphology

decibel = bel (semi-transparent) = deci + bel

Formally deci- (one tenth) + bel gives the literal meaning, but 'bel' is a technical/eponymous unit and 'deci-' is a metric combining form that may be unfamiliar to many learners.

Etymology

Decibel comes from deci- ('one tenth') and bel (a unit named after Alexander Graham Bell). So, a decibel is literally a 'tenth of a bel' and is the unit we use to measure how loud a sound is.