What does FM on the car mean?
2 Answers
FM/AM refers to the radio function in the car. Here is some relevant information: 1. FM stands for Frequency Modulation band: The broadcast frequency range is 87.5~108MHz. 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. 2. Amplitude Modulation (AM) broadcasting: AM broadcasting modulates the audio signal onto the "amplitude" of a high-frequency carrier wave and transmits it into the air. The radio receives the AM radio signals in the air through a magnetic antenna or an external antenna, and then demodulates the audio signal through high-frequency tuning → intermediate frequency amplification → detection circuit. The audio signal is then amplified by the audio amplification circuit to restore the radio program content.
FM in the car? I must say, that refers to frequency modulation radio. It uses frequency modulation to transmit audio signals in the car audio system. I remember when I first started driving, I often relied on it to pass the time, like listening to music or news during commutes. The operation is simple—just press a button to select FM mode, then turn the knob to find a station between 88-108 MHz. With good signal, the sound quality is crisp and clear, with less noise compared to AM radio, though it weakens in mountainous areas or basements. Once, during a long drive, I relied entirely on FM to listen to local traffic reports and avoid congestion. Saving a few favorite channels allows one-touch playback, which is super convenient. Although phones can now play music, FM remains a free, network-independent backup option. Antenna issues sometimes cause silence, but overall, it's basic in-car entertainment.
