directivity index

简明释义

定向系数

英英释义

例句

1.When designing a concert hall, acousticians consider the directivity index 指向性指数 of the sound system to ensure optimal sound distribution.

在设计音乐厅时，声学专家会考虑音响系统的directivity index 指向性指数 以确保最佳的声音分布。

2.Measuring the directivity index 指向性指数 helps engineers optimize antenna performance for better signal reception.

测量directivity index 指向性指数 有助于工程师优化天线性能，以获得更好的信号接收。

3.A high directivity index 指向性指数 means that the microphone is better at picking up sounds from one direction while rejecting noise from others.

高directivity index 指向性指数 意味着麦克风更擅长从一个方向接收声音，同时拒绝来自其他方向的噪音。

4.In audio engineering, the directivity index 指向性指数 of a loudspeaker affects how it interacts with the room acoustics.

在音频工程中，扬声器的directivity index 指向性指数 会影响其与房间声学的相互作用。

5.The speaker's directivity index 指向性指数 indicates how focused the sound output is in a specific direction.

扬声器的directivity index 指向性指数 表明声音输出在特定方向上的集中程度。

作文

In the field of acoustics and audio engineering, understanding various parameters that affect sound propagation is crucial. One such important parameter is the directivity index, which plays a significant role in determining how sound is distributed in a given environment. The directivity index is defined as a measure of how much a sound source directs its energy in a particular direction compared to an omnidirectional source. This concept is vital for designing speakers, microphones, and other audio devices that require precise sound control. The directivity index is usually expressed in decibels (dB) and can significantly influence the performance of audio systems. For instance, a high directivity index indicates that a sound source focuses its energy in a specific direction, which is beneficial in environments where sound needs to reach a particular audience or area. Conversely, a low directivity index means that the sound spreads out more evenly in all directions, which might be suitable for background music or ambient sound applications.To illustrate the importance of the directivity index, consider a concert hall where clarity and focus of sound are paramount. In such settings, speakers with a high directivity index are often used to ensure that the sound reaches the audience directly without excessive reflections from walls or ceilings. This focused sound delivery enhances the listening experience and allows for better sound quality, making it easier for the audience to enjoy the performance. On the other hand, in open spaces or outdoor events, a lower directivity index may be more appropriate. Here, the goal is to create an immersive experience where the sound envelops the audience rather than directing it towards a specific point. This type of sound distribution can help in creating a more relaxed atmosphere, conducive to social interaction and enjoyment. The calculation of the directivity index involves comparing the sound pressure levels measured in different directions around the sound source. By analyzing these measurements, engineers can determine how effectively a speaker or microphone can direct sound. This analysis is critical when designing audio equipment for various applications, from public address systems to high-fidelity home theaters.Moreover, the directivity index is not only relevant in the context of sound but also has implications in other fields such as telecommunications and radar technology. In these areas, understanding how signals propagate in specific directions can lead to improved communication systems and enhanced detection capabilities.In conclusion, the directivity index is a fundamental concept in acoustics that describes how sound energy is directed by a source. Its significance extends beyond just audio engineering; it influences various technologies that rely on sound and signal transmission. By mastering the principles of the directivity index, engineers and designers can create more effective and efficient audio systems that cater to the specific needs of their environments. Understanding this concept not only enhances technical knowledge but also contributes to the overall improvement of sound quality in diverse applications.

在声学和音频工程领域，理解影响声音传播的各种参数至关重要。其中一个重要参数是指向性指数，它在确定声音在特定环境中的分布方面发挥着重要作用。指向性指数被定义为与全向声源相比，声音源在特定方向上引导其能量的程度。这一概念对于设计需要精确控制声音的扬声器、麦克风和其他音频设备至关重要。指向性指数通常以分贝（dB）表示，并可能显著影响音频系统的性能。例如，高指向性指数表示声音源将其能量集中在特定方向，这在声音需要到达特定观众或区域的环境中是有利的。相反，低指向性指数意味着声音更均匀地向四面八方扩散，这可能适合背景音乐或环境声音应用。为了说明指向性指数的重要性，考虑一个音乐厅，在这里声音的清晰度和集中度至关重要。在这种情况下，通常使用具有高指向性指数的扬声器，以确保声音直接到达观众，而不会过多地从墙壁或天花板反射。这种集中的声音传递增强了听觉体验，使观众更容易享受表演。另一方面，在开放空间或户外活动中，较低的指向性指数可能更为合适。在这里，目标是创造一种沉浸式体验，让声音包围观众，而不是指向特定点。这种类型的声音分布有助于营造更加轻松的氛围，有利于社交互动和享受。计算指向性指数涉及比较在声音源周围不同方向上测得的声压水平。通过分析这些测量，工程师可以确定扬声器或麦克风在引导声音方面的有效性。这种分析在设计用于各种应用的音频设备时至关重要，从公共广播系统到高保真家庭影院。此外，指向性指数不仅在声音的上下文中相关，还对其他领域如电信和雷达技术具有影响。在这些领域，理解信号如何在特定方向上传播可以改善通信系统和增强探测能力。总之，指向性指数是声学中的一个基本概念，描述了声音源如何引导声音能量。它的意义超越了音频工程，影响到依赖声音和信号传输的各种技术。通过掌握指向性指数的原理，工程师和设计师可以创造出更有效和高效的音频系统，以满足其环境的特定需求。理解这一概念不仅增强了技术知识，还促进了在各种应用中声音质量的整体提升。