directivity index

简明释义

指向性指数指向性指数

英英释义

例句

1.When designing a PA system, consider the directivity index for optimal sound distribution.

在设计公共广播系统时，考虑指向性指数以实现最佳声音分布。

2.The directivity index helps determine how well a speaker can project sound to an audience.

指向性指数有助于确定扬声器向观众投射声音的效果。

3.A high directivity index can enhance the clarity of audio in large venues.

高指向性指数可以提高大型场馆中的音频清晰度。

4.The loudspeaker's directivity index indicates its ability to focus sound in a specific direction.

扬声器的指向性指数表明其在特定方向上集中声音的能力。

5.In our acoustics class, we learned how to measure the directivity index of different microphones.

在我们的声学课上，我们学习了如何测量不同麦克风的指向性指数。

作文

The concept of directivity index is crucial in the field of acoustics and audio engineering. It refers to a measure that quantifies how directional a sound source is, compared to an omnidirectional source. Understanding the directivity index can significantly impact the design and implementation of sound systems, especially in environments where sound clarity and focus are paramount. For instance, in concert halls or theaters, a high directivity index indicates that the sound is directed towards the audience, minimizing reflections and ensuring that the sound is clear and well-defined. The mathematical representation of the directivity index is often expressed in decibels (dB). A higher value signifies that the sound is more focused in a particular direction, while a lower value indicates a more dispersed sound field. This measurement is particularly important when designing microphones and loudspeakers. For example, a microphone with a high directivity index will pick up sound primarily from the source in front of it, reducing background noise and enhancing the quality of the recorded audio. Conversely, a loudspeaker with a low directivity index will spread sound evenly across a wide area, which may be desirable in certain applications such as public address systems.In practical applications, understanding the directivity index helps engineers and sound designers make informed decisions about equipment selection and placement. For instance, in a classroom setting, using microphones with a high directivity index can help reduce ambient noise, allowing students to hear the instructor more clearly. Similarly, in outdoor events, speakers with a high directivity index can project sound effectively to a specific audience area while minimizing sound spill into adjacent spaces.From a scientific perspective, the directivity index can also be used to analyze the performance of various sound sources. Researchers can study how different designs and materials affect the directivity index, leading to innovations in sound technology. For example, advancements in speaker design often aim to improve the directivity index to enhance the listening experience in various environments.Moreover, the directivity index is not limited to just audio applications. It can also be applied in fields like telecommunications and broadcasting, where the directionality of signals can affect transmission quality. Engineers often strive for a high directivity index in antennas to ensure that signals are transmitted efficiently over long distances without interference.In conclusion, the directivity index is a fundamental concept in acoustics and audio engineering that plays a vital role in the design and effectiveness of sound systems. By measuring the directionality of sound sources, professionals can optimize audio experiences in various settings, from concert halls to classrooms, and even in telecommunications. A thorough understanding of the directivity index allows for better decision-making in equipment selection and placement, ultimately enhancing sound quality and clarity for audiences everywhere.

“指向性指数”这一概念在声学和音频工程领域中至关重要。它指的是一种量度，量化声源的方向性与全向声源的比较。理解“指向性指数”可以显著影响声音系统的设计和实施，尤其是在声音清晰度和聚焦度至关重要的环境中。例如，在音乐厅或剧院中，高“指向性指数”表明声音是朝向观众发出的，从而减少反射，确保声音清晰且定义明确。“指向性指数”的数学表示通常以分贝（dB）表示。较高的值意味着声音更集中于特定方向，而较低的值则表示声音场更分散。这一测量在设计麦克风和扬声器时尤为重要。例如，具有高“指向性指数”的麦克风将主要接收来自其前方的声音，从而减少背景噪音，提高录音音频的质量。相反，具有低“指向性指数”的扬声器将在宽广区域均匀传播声音，这在某些应用中，如公共广播系统，可能是理想的选择。在实际应用中，理解“指向性指数”帮助工程师和声音设计师做出关于设备选择和放置的明智决策。例如，在课堂环境中，使用具有高“指向性指数”的麦克风可以帮助减少环境噪音，使学生能够更清晰地听到讲师的声音。同样，在户外活动中，具有高“指向性指数”的扬声器可以有效地将声音投射到特定的观众区域，同时最小化声音溢出到邻近空间。从科学的角度来看，“指向性指数”还可用于分析各种声源的性能。研究人员可以研究不同设计和材料如何影响“指向性指数”，从而推动声音技术的创新。例如，扬声器设计的进步常常旨在提高“指向性指数”，以增强各种环境中的听觉体验。此外，“指向性指数”不仅限于音频应用。它也可以应用于电信和广播等领域，其中信号的方向性会影响传输质量。工程师们通常追求高“指向性指数”的天线，以确保信号在长距离内高效传输，并且不受干扰。总之，“指向性指数”是声学和音频工程中的一个基本概念，在声音系统的设计和有效性中发挥着至关重要的作用。通过测量声源的方向性，专业人员可以优化各种环境中的音频体验，从音乐厅到教室，甚至在电信领域。对“指向性指数”的透彻理解使得设备选择和放置的决策更加科学，从而最终提升了各地观众的声音质量和清晰度。