# 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.