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decibel    音标拼音: [d'ɛsəb,ɛl]

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  • Decibel - Wikipedia
    The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B) It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale Two signals whose levels differ by one decibel have a power ratio of 10 1 10 (approximately 1 26 ) or root-power ratio of 10 1 20 (approximately 1 12 )
  • Decibel (dB) | Definition, Formula, Facts | Britannica
    Decibel (dB), unit for expressing the ratio between two amounts of electric or acoustic power or for measuring the relative loudness of sounds
  • What Are Decibels, and How Are They Measured? | HowStuffWorks
    A decibel is a measure of sound intensity and amplitude using the decibel (dB) scale The amplitude of a sound depends on its loudness
  • Levels Of Noise In Decibels (dB) Level Comparison Chart
    To express levels of sound meaningfully in numbers that are more manageable, a logarithmic scale is used, rather than a linear one This scale is the decibel scale A noise level chart showing examples of sounds with dB levels ranging from 0 to 180 decibels
  • What is a decibel (dB)? - RapidTables. com
    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 numbers with shorter notation
  • How To Understand The Unit Of Decibels (Simple explanation)
    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 human hearing
  • Decibel - The Engineering ToolBox
    The decibel is a logarithmic unit used to describe the ratio of a signal level - like power, intensity or amplitude - to a reference level Decibel is a dimensionless value of relative ratios The signal units depends on the nature of the signal - can be W for power
  • How to Calculate dB (Decibels) — Explained with Formula - OneSDR
    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? Let’s break it down in plain language — no engineering degree needed!
  • Decibels - HyperPhysics
    The factor of 10 multiplying the logarithm makes it decibels instead of Bels, and is included because about 1 decibel is the just noticeable difference (JND) in sound intensity for the normal human ear Decibels provide a relative measure of sound intensity
  • What is a decibel and what does it measure? - Healthy Hearing
    A decibel (dB) is a unit of measurement for sound levels, also known as amplitude or volume It is measured on a logarithmic scale, increasing exponentially Every increase of 10 dB on the decibel scale is equal to a 10-fold increase in sound pressure level





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