very high frequency

简明释义

甚高频甚高频甚高频

英英释义

例句

1.The very high frequency 超高频 range is ideal for line-of-sight communication.

对于视距通信来说，超高频 very high frequency范围是理想的选择。

2.The military uses very high frequency 超高频 bands for secure communications.

军方使用超高频 very high frequency频段进行安全通信。

3.Some television stations operate on very high frequency 超高频 to provide high-quality broadcasts.

一些电视台在超高频 very high frequency上运营，以提供高质量的广播。

4.In aviation, communication is often conducted on very high frequency 超高频 channels to ensure reliable transmission.

在航空领域，通信通常在超高频 very high frequency频道进行，以确保可靠的传输。

5.The radio station broadcasts on a very high frequency 超高频, allowing for clearer sound quality.

这家广播电台在超高频 very high frequency上播出，使声音质量更清晰。

作文

In the world of telecommunications and broadcasting, the term very high frequency (VHF) plays a crucial role. This frequency range, which spans from 30 MHz to 300 MHz, is essential for various forms of communication, including television and radio broadcasts. Understanding the significance of very high frequency is vital for anyone interested in the fields of electronics, media, or communications technology.The very high frequency band is particularly noteworthy because it allows for better propagation of signals over long distances. Unlike lower frequencies, which can be easily absorbed by the atmosphere, VHF signals can travel further and penetrate through obstacles such as buildings and trees. This characteristic makes very high frequency ideal for urban environments where tall structures can obstruct lower frequency signals.One of the most common uses of very high frequency is in FM radio broadcasting. FM radio stations typically operate within the VHF band, providing listeners with clear sound quality and reduced interference compared to AM radio. The clarity of FM signals is largely due to the properties of very high frequency, which allow for a more stable transmission of audio signals.Television broadcasting also heavily relies on very high frequency. Many television channels are allocated frequencies within the VHF range, making it possible for viewers to receive high-quality images and sound. The transition from analog to digital television has further enhanced the capabilities of VHF broadcasting, allowing for multiple channels to be transmitted simultaneously without degrading audio or video quality.In addition to broadcasting, very high frequency is used in two-way radio communications, especially in aviation and maritime industries. Pilots and air traffic controllers depend on VHF radios to communicate, as these frequencies provide reliable connections over considerable distances. Similarly, ships use very high frequency radios to maintain contact with coastal stations and other vessels, ensuring safety and coordination at sea.Moreover, the very high frequency spectrum is also utilized for public safety communications. Emergency services, such as police and fire departments, often use VHF radios to coordinate their efforts during emergencies. The reliability of very high frequency communications can be critical in situations where every second counts, making it an indispensable tool for first responders.However, there are challenges associated with using very high frequency. While VHF signals can travel long distances, they are still susceptible to interference from other electronic devices and environmental factors. This means that effective planning and management of the VHF spectrum are necessary to minimize disruptions and ensure clear communication.In conclusion, the term very high frequency encompasses a significant range of applications in modern society, from broadcasting to emergency communications. Its unique properties allow for effective signal transmission, making it an essential component of our communication infrastructure. As technology continues to evolve, the importance of understanding and utilizing very high frequency will only grow, highlighting the need for ongoing education and awareness in this field.

在电信和广播的世界中，术语非常高频（VHF）发挥着至关重要的作用。这个频率范围从30 MHz到300 MHz，对于各种通信形式至关重要，包括电视和广播。理解非常高频的重要性对于任何对电子学、媒体或通信技术感兴趣的人来说都是至关重要的。非常高频频段尤其值得注意，因为它允许信号在较长距离上更好地传播。与低频率不同，低频率容易被大气吸收，而VHF信号可以传播得更远，并穿透建筑物和树木等障碍物。这一特性使得非常高频非常适合城市环境，在这些环境中，高大的建筑物可能会阻碍低频信号。非常高频最常见的用途之一是在调频（FM）广播中。FM广播电台通常在VHF频段内运行，为听众提供清晰的音质和减少干扰，与AM广播相比。FM信号的清晰度在很大程度上归功于非常高频的特性，使音频信号的传输更加稳定。电视广播也严重依赖于非常高频。许多电视频道被分配在VHF频段内，使观众能够接收高质量的图像和声音。从模拟电视到数字电视的过渡进一步增强了VHF广播的能力，使多个频道能够同时传输而不降低音频或视频质量。除了广播之外，非常高频还用于双向无线电通信，特别是在航空和海事行业中。飞行员和空中交通管制员依赖VHF无线电进行通信，因为这些频率提供了可靠的连接，覆盖相当大的距离。同样，船只使用非常高频无线电与沿海站和其他船只保持联系，确保海上的安全和协调。此外，非常高频频谱还用于公共安全通信。紧急服务，例如警察和消防部门，通常使用VHF无线电在紧急情况下协调工作。非常高频通信的可靠性在每一秒都至关重要的情况下可能是关键，使其成为第一反应者不可或缺的工具。然而，使用非常高频也面临挑战。虽然VHF信号可以传播较长距离，但它仍然容易受到其他电子设备和环境因素的干扰。这意味着有效的VHF频谱规划和管理是必要的，以最小化干扰并确保清晰的通信。总之，术语非常高频涵盖了现代社会中许多重要的应用，从广播到紧急通信。它独特的特性允许有效的信号传输，使其成为我们通信基础设施的重要组成部分。随着技术的不断发展，理解和利用非常高频的重要性只会增加，突显出该领域持续教育和意识的必要性。