Amplitude Modulation [QUICK · 2025]

In AM, the frequency of the carrier remains constant, but its (its height or power) is altered to mirror the shape of the sound wave. When the sound is loud, the carrier wave gets taller; when the sound is soft, it shrinks. At the receiving end, a simple radio circuit "strips away" the carrier, leaving behind the original audio for the listener to hear. Why It Matters

AM was the first method used to transmit human speech over long distances. Its primary strength lies in its . Because the hardware required to transmit and receive AM signals is relatively inexpensive and easy to build, it became the global standard for the first half of the 20th century. amplitude modulation

To understand AM, imagine two distinct waves. The first is the —a steady, high-frequency signal that acts like a blank canvas. The second is the modulating signal , which contains the actual data, such as a person’s voice or music. In AM, the frequency of the carrier remains