Merits
The use of the decibel has a number of merits:
- The decibel's logarithmic nature means that a very large range of ratios can be represented by a convenient number, in a similar manner to scientific notation. This allows one to clearly visualize huge changes of some quantity. (See Bode Plot and half logarithm graph.)
- The overall gain of a multi-component system (such as consecutive amplifiers) can be calculated by summing the decibel gains of the individual components, rather than multiply the amplification factors (i.e. log(A × B × C) = log(A) + log(B) + log(C)).
- The human perception of the intensity of, for example, sound or light, is more nearly proportional to the logarithm of intensity than to the intensity itself, per the Weber–Fechner law, so the dB scale can be useful to describe perceptual levels or level differences.
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Famous quotes containing the word merits:
“This letter will be delivered to you by my child,—the child of my adoption,—my affection! Unblest with one natural friend, she merits a thousand. I send her to you innocent as an angel, and artless as purity itself; and I send you with her the heart of your friend, the only hope he has on earth, the subject of his tenderest thoughts, and the object of his latest cares.”
—Frances Burney (1752–1840)
“None merits the name of Creator but God and the poet.”
—Torquato Tasso (1544–1595)
“When you overpay small people you frighten them. They know that their merits or activities entitle them to no such sums as they are receiving. As a result their boss soars out of economic into magic significance. He becomes a source of blessings rather than wages. Criticism is sacrilege, doubt is heresy.”
—Ben Hecht (1893–1964)