critical frequency

简明释义

临界挠曲频率

英英释义

例句

1.Engineers must calculate the critical frequency (临界频率) to avoid signal distortion.

工程师必须计算critical frequency（临界频率）以避免信号失真。

2.The critical frequency (临界频率) for this transmission line is determined by its physical characteristics.

该传输线的critical frequency（临界频率）由其物理特性决定。

3.The radio communication system operates effectively only below the critical frequency (临界频率) of 30 MHz.

该无线电通信系统仅在30 MHz以下的critical frequency（临界频率）下有效运行。

4.Understanding the critical frequency (临界频率) is essential for designing antennas that perform well at higher frequencies.

理解critical frequency（临界频率）对于设计在高频下表现良好的天线至关重要。

5.If the signal frequency exceeds the critical frequency (临界频率), it may not be transmitted effectively.

如果信号频率超过critical frequency（临界频率），则可能无法有效传输。

作文

In the field of telecommunications and signal processing, the term critical frequency refers to a specific point in the frequency spectrum where significant changes occur in the behavior of a system. Understanding this concept is crucial for engineers and scientists working with various types of signals, including audio, radio, and electromagnetic waves. The critical frequency can be defined as the frequency at which the response of a system begins to change dramatically, often resulting in altered performance or characteristics. For example, in a communication system, if the transmitted signal exceeds the critical frequency, it may lead to distortion or loss of information, making it essential for designers to account for this parameter during the design phase.One of the most common applications of critical frequency is found in filters, which are used to allow certain frequencies to pass while attenuating others. Filters are categorized based on their critical frequency, which determines the cutoff point. For instance, in low-pass filters, the critical frequency is the threshold below which signals are allowed to pass through, while frequencies above this point are significantly reduced. Conversely, high-pass filters have a critical frequency above which signals are permitted to pass. This principle is essential in various applications, including audio processing, where engineers aim to eliminate unwanted noise while preserving the integrity of the desired signal.Moreover, in the context of antennas and transmission lines, the critical frequency plays a vital role in determining the effectiveness of signal propagation. The critical frequency indicates the maximum frequency at which a signal can be transmitted without excessive attenuation due to the medium through which it travels. If the frequency of the signal exceeds this critical frequency, it may not propagate effectively, leading to weak or lost signals. This understanding is particularly important in designing wireless communication systems, where maintaining signal strength over long distances is paramount.The concept of critical frequency also extends to other scientific fields, such as acoustics. In acoustics, the critical frequency can refer to the frequency at which sound waves begin to interact with the physical properties of an environment, such as walls or furniture, leading to phenomena like resonance or standing waves. Understanding these interactions allows architects and sound engineers to design spaces that optimize sound quality by considering the critical frequency of the materials used within the space.In conclusion, the critical frequency is a fundamental concept across various domains, including telecommunications, signal processing, and acoustics. It represents a pivotal frequency point that can significantly affect the performance and behavior of systems. Engineers and scientists must understand and consider the critical frequency when designing and implementing systems to ensure optimal functionality and performance. By doing so, they can mitigate potential issues related to signal distortion, loss, and ineffective propagation, ultimately leading to more reliable and efficient technological solutions.

在电信和信号处理领域，术语critical frequency指的是频谱中一个特定的点，在这个点上，系统的行为发生显著变化。理解这个概念对于从事各种类型信号（包括音频、无线电和电磁波）的工程师和科学家至关重要。critical frequency可以定义为系统响应开始剧烈变化的频率，通常会导致性能或特性的改变。例如，在通信系统中，如果传输信号超过了critical frequency，可能会导致失真或信息丢失，因此设计者在设计阶段必须考虑这一参数。critical frequency最常见的应用之一是在滤波器中，滤波器用于允许某些频率通过，同时衰减其他频率。滤波器根据其critical frequency进行分类，该频率决定了截止点。例如，在低通滤波器中，critical frequency是允许信号通过的阈值，而这个点以上的频率则会被显著降低。相反，高通滤波器的critical frequency是允许信号通过的频率上限。这一原理在各种应用中至关重要，包括音频处理，工程师旨在消除不必要的噪声，同时保持所需信号的完整性。此外，在天线和传输线的上下文中，critical frequency在确定信号传播的有效性方面发挥着至关重要的作用。critical frequency指示信号可以传输而不会因传播介质而过度衰减的最大频率。如果信号的频率超过了这个critical frequency，则可能无法有效传播，从而导致信号微弱或丢失。这一理解在设计无线通信系统时尤其重要，因为在长距离内保持信号强度至关重要。critical frequency的概念还扩展到其他科学领域，例如声学。在声学中，critical frequency可以指声波开始与环境的物理特性（例如墙壁或家具）相互作用的频率，从而导致共振或驻波等现象。理解这些相互作用使建筑师和声学工程师能够设计优化声音质量的空间，通过考虑空间内使用材料的critical frequency。总之，critical frequency是多个领域中的基本概念，包括电信、信号处理和声学。它代表一个关键的频率点，可以显著影响系统的性能和行为。工程师和科学家必须理解并考虑critical frequency，以确保最佳功能和性能。通过这样做，他们可以减轻与信号失真、丢失和无效传播相关的潜在问题，最终导致更可靠和高效的技术解决方案。