Principles of Physics III
A bel is a unit of measurement that quantifies the intensity of sound, specifically in relation to the logarithmic scale of sound pressure levels. It is used to express the ratio of a particular sound pressure to a reference sound pressure, allowing for a more manageable way to represent the wide range of human hearing. The bel is not commonly used alone; instead, the decibel (dB), which is one-tenth of a bel, is more frequently utilized in practical applications.
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