amplitude modulation

简明释义

调幅振幅调制

英英释义

例句

1.In amplitude modulation, the amplitude of the carrier wave is varied to encode the information.

在幅度调制中，载波的幅度被改变以编码信息。

2.The quality of sound in amplitude modulation can be affected by interference.

在幅度调制中，声音质量可能会受到干扰的影响。

3.Many vintage radios rely on amplitude modulation for receiving signals.

许多复古收音机依赖于幅度调制来接收信号。

4.The radio station uses amplitude modulation to broadcast its signal.

这家广播电台使用幅度调制来广播其信号。

5.Engineers often prefer amplitude modulation for its simplicity in design.

工程师们常常喜欢幅度调制，因为它设计简单。

作文

Amplitude modulation (AM) is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. In AM, the amplitude of the carrier wave is varied in proportion to the waveform being sent. This means that the strength of the signal changes according to the information being conveyed, such as voice or music. The concept of amplitude modulation can be traced back to the early 20th century when inventors and engineers sought ways to improve the transmission of audio signals over long distances.One of the primary advantages of amplitude modulation is its simplicity. The technology behind AM is relatively straightforward, making it easy to implement and understand. This simplicity allows for the use of less complex equipment, which was particularly beneficial in the early days of radio broadcasting. As a result, AM became the standard for commercial radio stations, providing a means for people to access news, entertainment, and information from the comfort of their homes.However, despite its advantages, amplitude modulation has some significant drawbacks. One major issue is its susceptibility to noise and interference. Since AM signals vary in amplitude, they can easily be affected by environmental factors such as electrical interference from power lines or other electronic devices. This can lead to a degradation in sound quality, making it challenging for listeners to enjoy clear audio. Additionally, AM broadcasts typically have a lower sound quality compared to other modulation techniques, such as frequency modulation (FM).As technology advanced, so did the methods of audio transmission. FM radio emerged as a popular alternative to AM, offering higher sound quality and better resistance to interference. However, amplitude modulation still holds a significant place in the world of broadcasting. Many AM radio stations continue to operate today, particularly in rural areas where FM signals may not reach as effectively.Moreover, amplitude modulation is not limited to just radio broadcasting. It also plays a crucial role in various forms of communication technology, including television and satellite communications. In these applications, AM can be used to transmit visual information alongside audio, allowing for a more comprehensive communication experience.In conclusion, amplitude modulation is an essential concept in the field of electronic communication. Its historical significance and continued use in various technologies underscore its importance. While it may not offer the same level of sound quality as newer methods like FM, its simplicity and wide-ranging applications ensure that it remains a relevant and valuable technique in the communication landscape. Understanding amplitude modulation allows us to appreciate the advancements in technology that have shaped how we connect and share information with one another.

幅度调制（AM）是一种用于电子通信的技术，最常用于通过无线电载波传输信息。在AM中，载波的幅度根据要发送的波形变化。这意味着信号的强度会根据所传达的信息（例如语音或音乐）而变化。幅度调制的概念可以追溯到20世纪初，当时发明家和工程师们寻求改善音频信号在长距离传输中的方式。幅度调制的主要优点之一是其简单性。AM背后的技术相对简单，使其易于实施和理解。这种简单性允许使用不那么复杂的设备，这在广播早期阶段尤其有利。因此，AM成为商业广播电台的标准，为人们提供了一种从家中舒适地获取新闻、娱乐和信息的手段。然而，尽管有其优点，幅度调制也存在一些显著的缺点。一个主要问题是它容易受到噪声和干扰的影响。由于AM信号的幅度变化，它们很容易受到环境因素的影响，例如来自电力线或其他电子设备的电气干扰。这可能导致声音质量下降，使听众难以享受清晰的音频。此外，与其他调制技术（如频率调制（FM））相比，AM广播通常具有较低的音质。随着技术的发展，音频传输的方法也随之进步。FM无线电作为AM的流行替代品出现，提供了更高的音质和更好的抗干扰能力。然而，幅度调制在广播世界中仍然占有重要地位。许多AM电台今天仍在运营，特别是在FM信号可能无法有效覆盖的农村地区。此外，幅度调制并不仅限于无线电广播。它在各种通信技术中也发挥着至关重要的作用，包括电视和卫星通信。在这些应用中，AM可用于同时传输视觉信息和音频，从而提供更全面的通信体验。总之，幅度调制是电子通信领域的重要概念。它的历史意义和在各种技术中的持续使用凸显了它的重要性。虽然它可能没有FM等新方法提供的音质水平，但其简单性和广泛的应用确保它在通信领域保持相关性和价值。理解幅度调制使我们能够欣赏塑造我们彼此连接和分享信息的技术进步。