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Definition

Decibel (dB); a unit of measurement for sound level or signal strength.

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How it's used

Scientific and technical contexts are where this term primarily lives, functioning as a standard unit of measurement for sound intensity. While it is a loan translation from English, it is fully integrated into everyday Cantonese when discussing noise pollution, audio equipment, or hearing protection. It is rarely used in casual conversation unless the topic specifically turns to volume levels or technical specifications.

Examples

Exceeding 100 decibels will really hurt your ears.

Common phrases

Grammar color guide

Noun
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Pronoun
Classifier
Particle
Connector