receiver noise

Receiver noise refers to the unwanted background signals and random electrical fluctuations that a radio receiver detects when trying to pick up a desired signal. These tiny, unintended signals are caused by natural processes, electronic components, and environmental factors, and they create a "hiss" or static sound. Noise limits the clarity of the received signal, making it harder to hear faint transmissions. Engineers work to minimize receiver noise through improved design and filtering, but some level is always present, affecting the overall quality of communication and reception.