If the measurement result 20 dB is presented separately, it can be specified using the information in parentheses, which is then part of the surrounding text and not a part of the unit: 20 dB (re 1 μV/m) …

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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 …

Oct 31, 2025 · decibel (dB), unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power, or for measuring the relative loudness of sounds. One decibel …

Apr 24, 2025 · If you’ve ever seen numbers like 60 dB or +3 dB on audio gear, radios, or electronics, you’re looking at a decibel (dB) value. But what does it actually mean — and how do you calculate it?

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 …

SPL in the average home is about 50 dB above the 0 dB threshold that serves as the SPL reference. When a vacuum cleaner one meter away is on, SPL increases to 70 dB. A chainsaw one meter away …

dB (G) measurements use a narrow band filter that gives high weighting to frequencies between 1 and 20 Hz, and low weighting to others. It thus gives large values for sounds and infrasounds that cannot …

This article breaks down the often-confusing world of decibel (dB) units, specifically exploring dB, dBc, dBd, dBi, dBm, and dBW. These units are crucial for expressing power measurements in a variety of …

Here, the square brackets mean “units of dB”. Notice that this formula is easy to remember because it has lots of tens, hence the “deci-” in “decibels”.