The Signal

The signal refers to a meaningful piece of information transmitted from one point to another, such as data, sound, or light. It carries specific, useful content like a conversation, an alarm, or a digital file. In communication systems, the signal is differentiated from noise, which is unwanted interference. Effective communication depends on clearly transmitting and accurately receiving the signal. Think of it as the message in a conversation or the data in a computer—it's what conveys the intended information between sender and receiver.