very-low frequency band

简明释义

甚低频频带

英英释义

例句

1.The very-low frequency band 超低频带 can transmit signals over long distances without much loss.

超低频带 very-low frequency band 可以在长距离内传输信号而损失很小。

2.The military often relies on the very-low frequency band 超低频带 for secure communications.

军方通常依赖 超低频带 very-low frequency band 进行安全通信。

3.In radio astronomy, the very-low frequency band 超低频带 helps in studying cosmic phenomena.

在射电天文学中，超低频带 very-low frequency band 有助于研究宇宙现象。

4.The very-low frequency band 超低频带 is often used for submarine communication due to its ability to penetrate water.

由于能够穿透水面，超低频带 very-low frequency band 通常用于潜艇通信。

5.Some navigation systems utilize the very-low frequency band 超低频带 for accurate positioning.

一些导航系统利用 超低频带 very-low frequency band 进行精准定位。

作文

The world of communication technology is vast and intricate, with various frequencies utilized for different purposes. Among these, the very-low frequency band plays a crucial role in specific applications that are essential for both military and civilian use. To better understand the significance of the very-low frequency band, we must first explore what it entails and how it operates.The very-low frequency band (VLF) refers to the radio frequency range from 3 kHz to 30 kHz. This frequency range is particularly notable due to its ability to penetrate deep into the earth and water, making it ideal for submarine communication and geological surveys. Radio waves in this frequency band can travel long distances, even under challenging conditions, which is why they are favored for certain types of communication where reliability is paramount.One of the most common uses of the very-low frequency band is in military applications. Submarines, for instance, rely on VLF signals to communicate with their command centers while submerged. The ability to transmit messages without surfacing is critical for maintaining stealth and operational security. VLF transmissions can be received by submarines at depths of up to 60 meters, allowing them to remain hidden from enemy detection while still receiving vital information.In addition to military uses, the very-low frequency band also finds application in various scientific fields. For example, VLF waves are used in geophysical studies to investigate the Earth's crust and mantle. By analyzing the way these low-frequency waves interact with geological formations, scientists can gain insights into the structure and composition of the Earth, which can aid in resource exploration and understanding seismic activity.Moreover, the very-low frequency band has been utilized in environmental monitoring. VLF radio waves can help detect changes in the ionosphere, which can be influenced by natural events such as solar flares or human activities. Monitoring these changes is essential for predicting weather patterns and understanding climate change impacts.Despite its advantages, there are challenges associated with using the very-low frequency band. The equipment required to transmit and receive VLF signals can be large and complex, making it less accessible for everyday use compared to higher frequency bands. Additionally, the bandwidth available in the VLF range is limited, which can restrict the amount of data that can be transmitted.In conclusion, the very-low frequency band is a vital component of modern communication and scientific research. Its unique properties allow for reliable communication in challenging environments, making it indispensable for military operations and geological studies. As technology advances, we may see new innovations that enhance the capabilities of VLF communications, further solidifying its importance in our increasingly interconnected world.

通信技术的世界广阔而复杂，不同的频率用于不同的目的。其中，超低频段在军事和民用等特定应用中发挥着至关重要的作用。要更好地理解超低频段的重要性，我们首先必须探讨其含义及其运作方式。超低频段（VLF）指的是从3 kHz到30 kHz的无线电频率范围。这个频率范围特别显著，因为它能够深入穿透地球和水体，使其成为潜艇通信和地质勘测的理想选择。VLF信号可以在困难条件下长距离传播，这就是为什么它们在某些需要可靠性的通信中受到青睐。超低频段最常见的用途之一是军事应用。例如，潜艇依赖VLF信号在水下与指挥中心通信。在不浮出水面的情况下传递消息的能力，对保持隐蔽性和操作安全至关重要。VLF传输可以在深达60米的深度被潜艇接收，使它们能够在不被敌方侦测的情况下接收重要信息。除了军事用途，超低频段还在各种科学领域中得到了应用。例如，VLF波被用于地球物理研究，以调查地壳和地幔。通过分析这些低频波与地质结构的相互作用，科学家可以获得有关地球结构和成分的见解，这有助于资源勘探和了解地震活动。此外，超低频段还被用于环境监测。VLF无线电波可以帮助检测电离层的变化，而电离层的变化可能受到自然事件（如太阳耀斑）或人类活动的影响。监测这些变化对预测天气模式和理解气候变化影响至关重要。尽管有其优势，但使用超低频段也面临挑战。传输和接收VLF信号所需的设备可能庞大而复杂，使其相比于更高频率的频段而言，日常使用上不那么容易。此外，VLF范围内可用的带宽有限，这可能限制可以传输的数据量。总之，超低频段是现代通信和科学研究的重要组成部分。其独特的特性使其能够在具有挑战性的环境中进行可靠通信，使其在军事行动和地质研究中不可或缺。随着技术的进步，我们可能会看到新的创新，增强VLF通信的能力，进一步巩固其在我们日益互联的世界中的重要性。