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In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel originates from methods used to quantify signal loss in telegraph …

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Jan 21, 2026 · A decibel (dB) is a unit for expressing the ratio between two amounts of electric or acoustic power or for measuring the relative loudness of sounds.

Decibel (Symbol: dB) is a logarithmic unit that indicates ratio or gain. Decibel is used to indicate the level of acoustic waves and electronic signals. The logarithmic scale can describe very big or very small …

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A decibel (dB) is a unit used to measure the intensity or power level of sound or signal. It represents the logarithmic ratio between the measured value and a reference value, typically the threshold of …

You’ve probably already heard of decibels—the unit of measurement for sound. You may also know it’s abbreviated dB. But do you know the difference between safe and dangerous dB levels? Sounds at …

What is a logarithm? A brief introduction. The decibel (dB) is a logarithmic unit used to measure sound level. It is also widely used in electronics, signals and communication. The dB is a logarithmic way of …

Sign in to your Google Account to copy and modify an example spreadsheet with the dB (A), dB (B) and dB (C) calculation and the graph below.