Signal

A signal is both the process and the result of transmission of data over some media accomplished by embedding some variation. Signals are important in multiple subject fields, including signal processing, information theory and biology. In signal processing, a signal is a function that conveys information about a phenomenon.

Extends: [Engineering concepts](https://wikipedia.org.ai/Engineering concepts), [Digital signal processing](https://wikipedia.org.ai/Digital signal processing), [Signal processing](https://wikipedia.org.ai/Signal processing), [Telecommunication theory](https://wikipedia.org.ai/Telecommunication theory)