What is the difference between AM and FM radio waves?

By | April 10, 2021


AM radio waves preceded FM technology, and therefore AM has some disadvantages. The volume is more limited with AM radio waves, and AM radio waves are also more susceptible to weather changes and other static sources. FM technology is more robust and better adapted to high-quality music and intense singing.

Basic vocabulary

AM stands for ‘amplitude modulation’ while FM stands for ‘frequency modulation’. The frequency is generally measured in hertz, but AM waves are measured in kilohertz, while FM waves are measured in megahertz.


To transmit, AM waves adjust the amplitude of the wave – or how high the wave is – while FM radio waves adjust how often the waves come, one by one.


The frequency of AM radio waves is much lower than the frequency of FM radio waves, and that is the main difference between the two.

Interesting facts h2> Radios can retrieve both AM and FM frequencies, although FM technology – like newer technology – is also used for television. You often hear the phrases AM and FM in descriptions of radio stations, but what does that mean exactly? While consumers may not notice any difference in anything other than the letters, AM and FM radio waves are very different scientifically.