ETYM Latin attenuatio: cf. French atténuation.
1. The property of something that has been weakened or reduced in thickness or density.
2. Weakening in force or intensity; SYN. fading.
Power loss in an electrical system. In cables, generally expressed in dB per unit length.
The weakening of a transmitted signal, such as the distortion of a digital signal or the reduction in amplitude of an electrical signal, as it travels farther from its source. Attenuation is usually measured in decibels and is sometimes desirable, as when signal strength is reduced electronically, for example, by a radio volume control, to prevent overloading.