Amplitude & Frequency Modulation

What is amplitude modulation (AM)?

a process where the amplitude of a carrier signal is altered according to information in a message signal

What does amplitude modulation (AM) do to a sine wave?

compresses a sine wave

What is frequency modulation?

a technique in which frequency of carrier varies in accordance with the amplitude of the modulating signal keeping amplitude and phase constant

What happens to frequency during frequency modulation?

frequency varies periodically

What is a common real life example FM is used for?

pediatric hearing assessments