AM/FM

AM means amplitude modulation. The combined amplitude of the audio frequency and radio frequency will have to vary to match an audio signal. Am receivers will react to problems dealing with static interference. Electromagnetic waves are made by spark discharges. Am receivers soon lead to Fm radios.

FM means frequency modulation. The combined frequency of the waves changes to an audio signal. One example is that high frequency is related to the crest amplitude in an audio wave. Noise interference doesn’t interfere with the frequency of an Fm wave. Also Fm waves will give higher quality sound reproduction.

Radio transmissions are made up of a combination of two different types of waves. The first would be the audio frequency wave that represents the sounds be transmitted. The second is a radio frequency wave that carries all audio information. All waves have a certain wavelength and an amplitude and a frequency.

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