Amplitude Modulated signals

Amplitude Modulation (AM) is a technique used to encode information in radio waves by varying the strength, or amplitude, of the signal. This method is commonly used in AM radio broadcasting. Essentially, the audio signal (like music or voice) modifies the height of the radio wave, while the frequency remains constant. When a radio receiver picks up the AM signal, it decodes the variations in amplitude back into sound. This allows for the transmission of content over long distances, making it a key technology in communication, especially before the advent of more advanced methods like FM and digital broadcasting.