amplitude modulationfrequency modulation

简明释义

调幅调频

英英释义

例句

1.The technology behind amplitude modulation has been around since the early 20th century.

在20世纪初，幅度调制的技术就已经出现。

2.Many two-way radios rely on frequency modulation for clearer communication.

许多对讲机依赖于频率调制以实现更清晰的通信。

3.Understanding amplitude modulation is crucial for anyone working in radio broadcasting.

了解幅度调制对任何从事广播的人来说都是至关重要的。

4.Radio stations often use amplitude modulation to broadcast their signals over long distances.

广播电台通常使用幅度调制将信号广播到远距离。

5.In contrast, frequency modulation is used in FM radio for higher sound quality.

相比之下，频率调制用于调频广播，以获得更高的音质。

作文

In the world of telecommunications, two fundamental techniques for transmitting information are often discussed: amplitude modulation and frequency modulation. These methods are crucial for various forms of communication, including radio broadcasting, television signals, and even satellite communications. Understanding these concepts is essential for anyone interested in the field of electronics and communication technology.Amplitude modulation (AM) involves varying the strength or amplitude of a carrier wave in accordance with the information signal being sent. This technique allows for the transmission of audio signals over long distances. For instance, when you listen to an AM radio station, the sound waves from the broadcaster's voice modulate the amplitude of the radio wave. The receiver then demodulates the signal, converting it back into sound. One of the advantages of amplitude modulation is its simplicity; however, it is also susceptible to noise and interference, which can degrade the quality of the received signal.On the other hand, frequency modulation (FM) alters the frequency of the carrier wave instead of its amplitude. This means that the information signal causes the frequency of the wave to change, leading to a more robust transmission. FM is widely used for music and voice broadcasting because it provides better sound quality and is less prone to interference compared to AM. When you listen to an FM radio station, the variations in frequency create a richer audio experience than what is typically found in AM broadcasts.Both amplitude modulation and frequency modulation have their unique applications and advantages. For example, AM is often used for talk radio and news broadcasts, where voice clarity is paramount but high fidelity is not as critical. Conversely, FM is preferred for music stations and high-fidelity audio transmissions due to its superior sound quality.The choice between using amplitude modulation or frequency modulation often depends on the specific requirements of the transmission. Factors such as range, fidelity, and resistance to interference play significant roles in determining which method is more appropriate for a given situation. Additionally, advancements in technology have led to the development of new modulation techniques that combine aspects of both AM and FM, further enhancing communication capabilities.In conclusion, understanding amplitude modulation and frequency modulation is vital for anyone involved in telecommunications. These techniques form the backbone of how we communicate over various media, from radio to television and beyond. As technology continues to evolve, so too will the methods we use to transmit information, but the fundamental principles of AM and FM will always remain relevant in the world of communication technology.

在电信领域，两个基本的传输信息的技术经常被讨论：幅度调制和频率调制。这些方法对于各种通信形式至关重要，包括广播、电视信号甚至卫星通信。理解这些概念对于任何对电子和通信技术感兴趣的人来说都是必不可少的。幅度调制（AM）涉及根据所发送的信息信号变化载波波的强度或幅度。这种技术允许音频信号在长距离上传输。例如，当你收听AM广播电台时，广播者声音的声波调制了无线电波的幅度。接收器然后对信号进行解调，将其转换回声音。幅度调制的一个优点是它的简单性；然而，它也容易受到噪声和干扰的影响，这可能会降低接收到的信号质量。另一方面，频率调制（FM）则改变载波波的频率，而不是其幅度。这意味着信息信号使波的频率发生变化，从而导致更强健的传输。FM广泛用于音乐和语音广播，因为它提供更好的音质，并且比AM更不容易受到干扰。当你收听FM广播电台时，频率的变化创造出比AM广播中通常找到的更丰富的音频体验。幅度调制和频率调制各有其独特的应用和优势。例如，AM通常用于谈话广播和新闻广播，在这些情况下，声音清晰度至关重要，但高保真度并不是那么关键。相反，FM因其卓越的音质而被优先用于音乐电台和高保真音频传输。选择使用幅度调制还是频率调制通常取决于传输的具体要求。范围、保真度和抗干扰能力等因素在决定哪种方法更适合特定情况时起着重要作用。此外，技术的进步导致了新调制技术的发展，这些技术结合了AM和FM的某些方面，进一步增强了通信能力。总之，理解幅度调制和频率调制对于任何参与电信的人来说都是至关重要的。这些技术构成了我们通过各种媒体进行沟通的基础，从广播到电视及更远的地方。随着技术的不断发展，我们用来传输信息的方法也将不断演变，但AM和FM的基本原理在通信技术的世界中始终保持相关性。