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  1. 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 …

  2. 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.

  3. What Are Decibels, and How Are They Measured? | HowStuffWorks

    Sep 7, 2023 · 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 …

  4. 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 …

  5. 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 …

  6. 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 …

  7. 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 …

  8. dB: What is a decibel? - UNSW Sites

    This example shows a feature of decibel scales that is useful in discussing sound: they can describe very big ratios using numbers of modest size. But note that the decibel describes a …

  9. Understanding Sound Decibels: A Comprehensive Guide

    Jun 7, 2025 · The term 'decibel' is a fundamental concept in sound measurement, often abbreviated as dB. It serves as a logarithmic unit that quantifies the intensity of sound waves.

  10. What is a decibel and what does it measure? - Healthy Hearing

    Nov 6, 2024 · 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 …