# 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__.