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An example scale showing power ratios x, amplitude ratios √x, and dB equivalents 10 log10 x. The decibel (symbol: dB) is a logarithmic unit used to express the ratio of one value of a ...


Lesson 2: Sound Properties and Their Perception. Intensity and the Decibel Scale. Sound waves are introduced into a medium by the vibration of an object.


We often use this logarithmic scale to describe the intensity of sound.


A readable explanation of the decibel scale (dB scale), including dBA and dBC. Also phons and sones, noise units for measuring loudness.


dB scale with some rough examples We said above that the decibel is a ratio. So, when it is used to give the sound ...


A decibel dB(A) is a unit of measurement that indicates how loud a sound is. Humans can hear sounds between 0 and 140 decibels.


The decibel scale measures sound based on human hearing, which makes it one of the most unusual scientific measurements.


Decibel Exposure Time Guidelines ... see the tabs at the bottom of the page to find sound levels for settings occupational, non-occupational, military, aircraft, etc .

Jan 17, 2013 ... I'm sorry, but your reference value is completely wrong. It is not 1W/m², it is 10^(- 12) W/m²! Just look at your crying baby: assume your dB ...