amplitude modulation - Definition & Meaning

one of the main methods of radio broadcasting with a lower sound quality than FMone of the main methods of radio broadcasting with a lower sound quality than FM

Amplitude modulation (AM) is a method of transmitting radio signals by varying the strength or height of the radio wave. In AM radio, the audio signal changes the amplitude, or power, of the carrier wave, while the frequency remains constant. This technique is commonly used for speech and talk radio, but it is more affected by interference from noise and weather conditions compared to frequency modulation (FM). AM signals can travel long distances, making them ideal for reaching wide areas, but the sound quality is often less clear than FM.Amplitude modulation (AM) is a method of transmitting radio signals by varying the strength or height of the radio wave. In AM radio, the audio signal changes the amplitude, or power, of the carrier wave, while the frequency remains constant. This technique is commonly used for speech and talk radio, but it is more affected by interference from noise and weather conditions compared to frequency modulation (FM). AM signals can travel long distances, making them ideal for reaching wide areas, but the sound quality is often less clear than FM.

例句

The AM signal fades out when driving through areas with poor reception.
在接收不良的地区行驶时，幅度调制信号会逐渐消失。
The weather is causing some interference with the AM radio signal, making it hard to hear clearly.
天气正在对调幅无线电信号造成一些干扰，使得难以听清楚。
AM radio works well over long distances, which is why it's commonly used by news stations.
调幅无线电在长距离上工作良好，这就是为什么它通常被新闻电台使用。