frequency modulation

简明释义

调频频率调制

英英释义

例句

1.The principle of frequency modulation is widely used in television broadcasting.

在电视广播中，频率调制的原理被广泛应用。

2.The radio station uses frequency modulation to improve sound quality.

该电台使用频率调制来提高音质。

3.An example of frequency modulation can be seen in FM radios.

FM收音机是频率调制的一个例子。

4.Many modern communication systems rely on frequency modulation for clearer audio transmission.

许多现代通信系统依赖于频率调制以实现更清晰的音频传输。

5.In frequency modulation, the frequency of the carrier wave varies with the amplitude of the input signal.

在频率调制中，载波的频率随着输入信号的幅度变化。

作文

Frequency modulation, often abbreviated as FM, is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. The primary principle behind frequency modulation (频率调制) is to vary the frequency of the carrier wave in accordance with the amplitude of the input signal. This modulation technique is widely utilized in various applications, including radio broadcasting, two-way radios, and television audio signals.One of the most significant advantages of frequency modulation (频率调制) over amplitude modulation (AM) is its resistance to noise. In AM, the amplitude of the carrier wave is varied, which makes it susceptible to interference from electrical equipment and atmospheric conditions. On the other hand, since FM encodes information in the frequency changes rather than the amplitude, it can provide clearer sound quality and greater fidelity. This is particularly important in music broadcasting, where high-quality sound reproduction is essential.The process of frequency modulation (频率调制) involves several key components. First, there is the modulator, which takes the original audio signal and modifies the frequency of the carrier wave based on the signal's amplitude. Next, the modulated signal is transmitted through the air using an antenna. Finally, at the receiving end, a demodulator extracts the original audio signal from the modulated carrier wave, allowing the listener to hear the transmitted sound.In addition to its use in radio broadcasting, frequency modulation (频率调制) plays a crucial role in other technologies. For instance, it is employed in television broadcasting to transmit audio signals, ensuring that viewers receive clear sound alongside their visual content. Furthermore, FM is also used in data transmission systems, such as telemetry and digital communications, where reliable signal integrity is paramount.The development of frequency modulation (频率调制) has had a profound impact on the telecommunications industry. Engineers and researchers have continuously worked on improving FM technology, leading to innovations like stereo FM broadcasting, which allows for a more immersive listening experience by transmitting two separate audio channels. This advancement has transformed the way we consume music and radio content, making it more enjoyable and engaging.Moreover, the principles of frequency modulation (频率调制) extend beyond just audio applications. In recent years, FM techniques have been adapted for use in various fields, including radar and satellite communications. These advancements highlight the versatility and importance of frequency modulation (频率调制) in modern technology.In conclusion, frequency modulation (频率调制) is a vital technique in the world of electronic communication, offering numerous benefits over traditional modulation methods. Its ability to provide high-quality sound and resist interference makes it the preferred choice for radio broadcasting and other applications. As technology continues to evolve, the significance of frequency modulation (频率调制) will undoubtedly remain prominent, shaping the future of communication and media consumption.