The title says it all. I’ve just begun studying CCNA and everything I thought I knew about decibels (the prior musician side of me obviously correlated it with sound) was thrown out the window when I learned that it was also used to measure electrical signals. I’ve been trying to read wikis but none of them really hit on how it can measure both sound and voltage, which are two completely different things…
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Decibels are the logarithmic measure of intensity that a wave of energy has.
Decibels are useful for sound as the logarithmic scale closely mimics the ability of the human ear to hear specific sound frequencies.
For electronics, they are often used to express power or amplitude ratios.
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