Frequency modulation (FM) is a method of encoding information in a carrier wave by varying its frequency. In FM, the amplitude of the wave remains constant while the frequency changes according to the input signal, such as sound. This technique is commonly used in radio broadcasting to transmit audio signals over long distances. FM offers several advantages, including improved sound quality and resistance to interference compared to amplitude modulation (AM). Because of its ability to minimize noise, FM is widely used in music transmission and two-way radio communications, making it a popular choice for both commercial and personal use.