About 432,000 results
Open links in new tab
  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. 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 …

  5. 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 …

  6. DECIBEL Definition & Meaning - Merriam-Webster

    Dec 8, 2016 · 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 …

  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. 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 …

  9. 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 …

  10. What is dB? A Complete Guide for Measuring Sound using Decibel

    Aug 14, 2025 · A dB or decibel is a measuring unit that evaluates the relative power or intensity of sound, generally in contrast with a reference point.

  11. 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.

  12. what is a decibel - 1st-acoustics.com

    The decibel is a fundamental unit for measuring sound intensity, allowing us to quantify and compare the vast range of sounds we encounter. Understanding decibels is essential for …

  13. Decibel - Simple English Wikipedia, the free encyclopedia

    The decibel (symbol: dB) measures ratios of power or intensity. It expresses them as an exponential function. One bel is a power ratio of 10:1, and is divided into ten decibels. An …

  14. Decibel - Wikiwand

    The decibel 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 logar...

  15. 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 …

  16. DECIBEL Definition & Meaning | Dictionary.com

    DECIBEL definition: a unit used to express the intensity of a sound wave, equal to 20 times the common logarithm of the ratio of the pressure produced by the sound wave to a reference …

  17. DECIBEL | definition in the Cambridge English Dictionary

    / ˈdes·əˌbel, -bəl / Add to word list a unit for measuring the loudness of sound (Definition of decibel from the Cambridge Academic Content Dictionary © Cambridge University Press)

  18. Sound - Decibel, Frequency, Amplitude | Britannica

    3 days ago · Although the decibel scale is nonlinear, it is directly measurable, and sound-level meters are available for that purpose. Sound levels for audio systems, architectural acoustics, …

  19. dBm - Wikipedia

    The decibel (dB) is a dimensionless unit, used for quantifying the ratio between two values, such as signal-to-noise ratio. The dBm is also dimensionless, [1][2] but since it compares to a fixed …

  20. definition decibel - 1st-acoustics.com

    A decibel is a unit of measurement used to express the intensity of sound. It is named after Alexander Graham Bell, who coined the term "dB" as a way to quantify the relative loudness of …

  21. SPOILER: Here Are Decibel’s Top 40 Albums of 2025

    Nov 12, 2025 · Just revisit Decibel ’s first issue of the year, which included our Top 21 Most Anticipated Albums of 2025 feature. Only 12 of those records included in the list were released …

  22. Decibel: Definition & Measurement Techniques | Vaia

    May 12, 2024 · A decibel (dB) is a logarithmic unit used to measure sound intensity and other quantities, with each 10 dB increase representing a tenfold increase in measured intensity.

  23. Decibel – Wikipédia

    A decibel (dB) két mennyiség arányának logaritmikus mértéke, amit széles körben használnak az akusztika, a fizika és az elektronika területén. Eredetileg a teljesítmény vagy a térerősség …