What does FM in a car mean?

[VioletMarie]

FM in a car refers to the frequency modulation band in the car audio system's radio function. After pressing the button, you can listen to the radio on the corresponding band, representing the technology used by broadcast stations to transmit signals and the reception standard of the receiving equipment (radio). FM stands for frequency modulation band: the broadcast frequency range is from 87.5 to 108 MHz. Due to the different audio signal modulation methods used, the restored sound quality is clear, far better than the effect of amplitude modulation. For example, in wireless TV signals, the image uses amplitude modulation, while the sound uses frequency modulation. The FM radio receives FM station signals through the antenna, processes them through tuning, intermediate frequency amplification, and frequency discrimination circuits, separates the audio signal, and amplifies it at low frequency to output sound through the speaker.