Decibels definition

Decibels. (dB) means the unit for measuring the volume of sound, equal to 20 times the logarithm to the base 10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (0.0002 dynes per square centimeter).
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Decibels means a dimensionless unit used in comparison of the magnitude of sound pressures or powers;
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Examples of Decibels in a sentence

  • Decibels with reference to 0.0002 microbar as measured on the "A" scale.

  • Fixtures shall be LED type and include floor sounding single adjustable tone of no less than 20 Decibels at not more than 1500 hertz, shall sound as the car is passing or stopping at a floor.

  • Decibels with reference to 0.0002 microbar as measured on the “A” scale.

  • Examples of Typical Approximate Sound level:• Sound Levels in Decibels (dB)*• Refrigerator humming 40• Normal conversation 60• City traffic 80• Motorcycles and lawnmowers 90#• Rock concerts 110-120#• Firearms 120-140# * A decibel (dB) is a unit of relative measurement of the strength of sound wave.

  • Decibels are referenced to either 20 uPa for sound pressure levels or one pW for sound power levels.

  • Decibels (dB): The decibel is used to measure sound pressure level.

  • Decibels “C” weighted scale (dBC): The “C” filter uses little filtering and has nearly a flat frequency response (equal magnitude of frequencies) throughout the audio range.

  • Decibels “A” weighted scale (dBA): The most widely used sound level filter is the “A” weighted scale.

  • Accumulative margin: The figure, in EPNdB (Effective Perceived Noise in Decibels), is obtained after summing up the differences between noise calculated and noise certificated at each of the three points of reference defined in the Convention on International Civil Aviation, volume 1, second part, chapter 3, annex 16.

  • The Group counselled that negotiators would therefore need to balance credibility and flexibility while keeping in mind the need for precise and practical approaches.

Related to Decibels

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