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What does FM/AM mean in a car?

2 Answers

Herb

07/29/25 4:22am

FM and AM are two radio modes for car radios. One is FM mode, and the other is AM mode. Generally, FM is more commonly used in daily life. The following is a related introduction to FM and AM: FM and AM: FM is frequency modulation broadcasting for radios, while the AM band is medium wave broadcasting, and FM is shortwave. Amplitude modulation waves are further divided into long wave, medium wave, and shortwave. Characteristics of medium and long waves: The advantage is that radio waves can propagate along the ground, covering a relatively long distance with good signal quality. The disadvantage is that the electrical signal attenuates quickly, and signals in distant locations are too weak to be received. Characteristics of shortwave: It cannot propagate along the ground; its transmission form is line-of-sight propagation. Due to the Earth's surface being spherical, the distance of line-of-sight propagation is limited.

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MacNathan

08/12/25 8:06am

I saw the FM/AM logo in my car, which simply refers to the two band modes of the radio: FM stands for frequency modulation broadcasting, and AM stands for amplitude modulation broadcasting. FM offers clearer sound quality, making it less noisy and more suitable for playing music or entertainment programs, but its signal coverage is relatively smaller, making it more useful in urban areas. AM, on the other hand, has rougher sound quality and is prone to noise, but its signals travel farther, allowing you to receive news and sports broadcasts even in mountainous or suburban areas. Cars usually have knobs or buttons to switch between FM and AM, and you can tune in to a station to listen. This feature is thoughtfully designed, allowing drivers to listen to real-time traffic information or weather forecasts without using their phones, making it highly practical. Nowadays, new cars come with Bluetooth or USB connectivity, but FM/AM remains a primary feature because radio is free and widely accessible, serving as a reliable backup in case of poor signal. I recommend car owners explore different radio stations to make their journeys more enjoyable and not let this feature go unused. Also, regularly check if the antenna is loose to avoid reception issues. After all, listening to something while driving can help relieve fatigue, making the trip both safe and enjoyable.

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