Practical differences between AM and FM

Amplitude Modulation Frequency Modulation
easier to implement
very susceptible to various weather conditions that deteriorate and distort the signal
most environmental factors that distort radio waves only affect its amplitude and not the frequency where FM stores the actual voice signal
stereo sound not easy to implement ability to send out two channels of information at the same time with the use of advanced algorithms
AM waves can be refracted in the atmosphere resulting in greater range FM signals usually drop of at around 50 miles from the station
Ideal for talk radio Ideal for stereo quality music
Using sound as an analogy, this would be like changing the volume Using sound as an analogy, this would be like changing the pitch — like playing different keys on a piano

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