# attenuation constant

## Definitions

### Electronics

- A rating for a transmission
__medium__ through which a __wave__ passes, such as a __cable__, which gives the rate of __amplitude__ decrease in the direction of travel. Expressed in decibels or nepers per unit length. It is the real number component of the propagation constant. Its __symbol__ is α. Also called attenuation factor, attenuation characteristic, __attenuation coefficient__ (1), or attenuation rate. - synonymattenuation characteristic
- synonymattenuation coefficient
- synonymattenuation factor
- synonymattenuation rate
- The decrease of the
__amplitude__ of a signal as a __function__ of the frequency.

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