What is DECIBELS #1 Linear and logarithmic scale.

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ElectronicsClub

Published on Mar 14, 2023
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In order to fully understand what a decibel is and how convenient it is to use, let's first consider the difference between a linear scale and a logarithmic scale. Let's learn how to use these scales for frequencies in the audio range of 20...20000 Hz. In some cases, it is convenient to use relative values ​​or times rather than absolute values ​​to compare any quantities. If the relative values ​​are small, it is convenient to use percentages. For example, the dollar has grown by 40%, or the car's fuel consumption has decreased by ten percent 10%, etc. If the value changes several times, it is convenient to use times, for example, the signal power has increased 30 times. When changing a value in a very wide range, for example, hundreds, thousands, millions of times, it is more convenient in practice to use decibels. Graphs are used as a visual representation of the nature of the changing value. In some cases, with relatively small changes in the value, a linear scale is used, and when decibels are used, a logarithmic scale comes to the rescue. #decibel #electronicsclub

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