Attenuation refers to the reduction in the strength or intensity of a signal as it travels through a medium. This concept is applicable in various fields, including telecommunications, acoustics, and optics. In general terms, attenuation can be described as the loss of energy or the decrease in amplitude of a signal due to factors such as: 1. **Distance**: As a signal travels further from its source, it typically loses strength.
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Reduction of transmitted intensity by absorption or scattering out of the accepted beam. For constant linear coefficient , a narrow unscattered beam follows .