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decibel    音标拼音: [d'ɛsəb,ɛl]

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  • Decibel - Wikipedia
    The decibel may be defined by the statement that two amounts of power differ by 1 decibel when they are in the ratio of 10 0 1 and any two amounts of power differ by N decibels when they are in the ratio of 10 N(0 1)
  • What Are Decibels, and How Are They Measured? - HowStuffWorks
    Decibels (abbreviated dB) are the units used to measure the relative intensity of a sound The decibel unit of measurement is a little odd because the human ear is incredibly sensitive The human ear can hear everything from your fingertip brushing lightly over your skin to a loud jet engine
  • Decibel (dB) | Definition, Formula, Facts | Britannica
    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
  • 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
  • DECIBEL Definition Meaning - Merriam-Webster
    The unit for measuring the relative intensities of sound is called a decibel Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of little more than 3 decibels
  • 6. 3: Decibels and sound levels - Physics LibreTexts
    This page covers the measurement of sound levels using the decibel (dB) scale and explains sound intensity level (SIL) and sound pressure level (SPL) as interchangeable concepts
  • Decibels in electronics: dB, dBm, dBV - a guide to units
    Decibel variants - an overview of the most important units While the decibel (dB) itself is a relative unit, expressing the ratio of two values, in practice we often need absolute units, referring to standard reference levels This is how a family of 'derivatives' of the decibel was created, such as dBm, dBV or dBW
  • 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? Explaining the Meaning and Scale
    The decibel provides a relative measure of sound by comparing it against a reference point, which is the faintest sound the average human ear can detect This system allows for consistent communication about sound levels
  • 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





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