lowest useful frequency

简明释义

最低可用频率

英英释义

例句

1.When planning a broadcast, it's important to calculate the lowest useful frequency 最低有效频率 to reach the target audience effectively.

在规划广播时，计算最低有效频率 最低有效频率 以有效覆盖目标受众是很重要的。

2.The lowest useful frequency 最低有效频率 for this type of sonar is essential for detecting objects underwater.

这种声纳的最低有效频率 最低有效频率 对于探测水下物体至关重要。

3.Understanding the lowest useful frequency 最低有效频率 helps engineers design better communication systems.

了解最低有效频率 最低有效频率 有助于工程师设计更好的通信系统。

4.The technician adjusted the settings to optimize the lowest useful frequency 最低有效频率 of the radar system.

技术人员调整设置以优化雷达系统的最低有效频率 最低有效频率。

5.In radio communication, the lowest useful frequency 最低有效频率 for long-distance transmission is crucial for ensuring clear signals.

在无线电通信中，最低有效频率 最低有效频率 对于远距离传输至关重要，以确保信号清晰。

作文

The concept of lowest useful frequency is critical in the field of radio communications and signal processing. Understanding this term helps us grasp how different frequencies can be utilized effectively for various applications. The lowest useful frequency refers to the minimum frequency at which a radio wave can operate efficiently for communication purposes. This frequency is crucial because it determines the range and clarity of the signals transmitted. In practical terms, when we talk about the lowest useful frequency, we are often referring to the lowest frequency that can still provide a reliable means of communication. For instance, in aviation, certain frequencies are designated for air traffic control that must be above the lowest useful frequency to ensure pilots and controllers can communicate without interference. If the frequency is too low, the signals may not propagate well, leading to poor communication quality or even loss of signal. Moreover, the lowest useful frequency varies depending on several factors, including environmental conditions, the type of terrain, and the technology used. For example, lower frequencies tend to travel further and penetrate obstacles better than higher frequencies. However, they also require larger antennas and are more susceptible to noise. In contrast, higher frequencies may offer better bandwidth and data rates but can be limited in range. Thus, finding the optimal lowest useful frequency for a specific application is essential for maximizing performance. In the context of emergency services, understanding the lowest useful frequency becomes even more critical. During disasters or crises, reliable communication is vital for coordinating rescue efforts and ensuring public safety. Emergency services must use frequencies that are above the lowest useful frequency to avoid disruptions caused by environmental factors or competing signals. This ensures that their communications remain clear and effective when it matters most. The military also relies heavily on the concept of lowest useful frequency. In combat situations, maintaining secure and reliable communications can be the difference between success and failure. Military operations often use frequencies that exceed the lowest useful frequency to ensure that their communications remain intact, even in challenging environments. This strategic use of frequencies allows for effective command and control during missions. In conclusion, the lowest useful frequency is a fundamental concept that underpins effective communication across various fields. From aviation and emergency services to military operations, understanding and applying the principles associated with the lowest useful frequency can significantly enhance communication reliability and efficiency. As technology continues to evolve, so too will our understanding of frequencies and their applications, making it essential for professionals in the field to stay informed about these developments. By grasping the importance of the lowest useful frequency, we can better appreciate the complexities of communication systems and their impact on our daily lives.

“最低有效频率”这一概念在无线通信和信号处理领域至关重要。理解这个术语有助于我们掌握不同频率如何有效地用于各种应用。“最低有效频率”是指无线电波能够有效进行通信的最低频率。这一频率至关重要，因为它决定了传输信号的范围和清晰度。在实际应用中，当我们谈论“最低有效频率”时，通常是指仍能提供可靠通信手段的最低频率。例如，在航空领域，某些频率被指定用于空中交通管制，必须高于“最低有效频率”，以确保飞行员和控制人员能够无干扰地沟通。如果频率过低，信号可能传播不良，导致通信质量差或信号丢失。此外，“最低有效频率”还会因多种因素而异，包括环境条件、地形类型和所用技术。例如，较低的频率通常传播得更远，并且能更好地穿透障碍物。然而，它们也需要更大的天线，并且更容易受到噪声的影响。相反，较高的频率可能提供更好的带宽和数据速率，但在范围上可能受到限制。因此，为特定应用找到最佳的“最低有效频率”对于最大化性能至关重要。在应急服务的背景下，理解“最低有效频率”变得更加重要。在灾难或危机期间，可靠的通信对于协调救援工作和确保公共安全至关重要。应急服务必须使用高于“最低有效频率”的频率，以避免因环境因素或竞争信号造成的干扰。这确保了他们的通信在关键时刻保持清晰和有效。军方也非常依赖“最低有效频率”的概念。在作战情况下，维护安全和可靠的通信可能是成功与失败之间的区别。军事行动通常使用超过“最低有效频率”的频率，以确保他们的通信在复杂环境中保持完整。这种频率的战略性使用使得在任务期间有效指挥和控制成为可能。总之，“最低有效频率”是支撑各个领域有效通信的基本概念。从航空和应急服务到军事行动，理解和应用与“最低有效频率”相关的原则可以显著提高通信的可靠性和效率。随着技术的不断发展，我们对频率及其应用的理解也将不断深化，这使得该领域的专业人士必须及时了解这些发展。通过掌握“最低有效频率”的重要性，我们可以更好地欣赏通信系统的复杂性及其对我们日常生活的影响。