directivity index

简明释义

指向性指数

英英释义

例句

1.In architectural acoustics, understanding the directivity index 指向性指数 of sound sources is crucial for effective design.

在建筑声学中，理解声源的directivity index 指向性指数对于有效设计至关重要。

2.The directivity index 指向性指数 of this loudspeaker is rated at 10 dB, which indicates its focused sound output.

这个扬声器的directivity index 指向性指数被评定为10分贝，表明其声音输出集中。

3.A higher directivity index 指向性指数 means the microphone is better at picking up sounds from a particular source.

更高的directivity index 指向性指数意味着麦克风在拾取特定来源的声音时表现更好。

4.The speaker's directivity index 指向性指数 helps determine how well it can project sound in a specific direction.

扬声器的directivity index 指向性指数有助于确定其在特定方向上投射声音的能力。

5.Engineers often measure the directivity index 指向性指数 to optimize audio equipment for live performances.

工程师通常测量directivity index 指向性指数以优化音频设备用于现场表演。

作文

In the field of acoustics and audio engineering, the concept of directivity index plays a crucial role in understanding how sound is projected from a source. The directivity index is a measure that quantifies the directional characteristics of a sound source, indicating how much sound energy is radiated in a particular direction compared to the total sound energy emitted in all directions. This parameter is essential for designing speakers, microphones, and other audio equipment, as it directly influences the clarity and quality of sound in various environments.To comprehend the significance of the directivity index, one must first recognize the difference between omnidirectional and directional sound sources. An omnidirectional source radiates sound equally in all directions, resulting in a directivity index of 0 dB. In contrast, a highly directional source focuses sound energy in a specific direction, leading to a higher directivity index. For instance, a parabolic microphone has a high directivity index, allowing it to capture sound from a particular direction while minimizing noise from other angles.The directivity index is typically expressed in decibels (dB) and can be calculated using the formula: DI = 10 log10 (D / W), where D represents the sound power in the desired direction, and W represents the total sound power output of the source. A higher directivity index indicates a more focused sound projection, which is advantageous in many applications, such as public speaking, live performances, and recording sessions.Understanding the directivity index is also vital when considering the acoustic environment in which sound will be used. For example, in a concert hall, the design of the space and the placement of speakers can significantly affect how sound is perceived by the audience. By utilizing speakers with an appropriate directivity index, sound engineers can ensure that the music or speech is heard clearly throughout the venue, avoiding issues such as echoes or dead spots.Moreover, the directivity index is not only applicable to sound sources but also to receivers, such as microphones. Directional microphones are designed with a specific directivity index to pick up sound from a particular direction while rejecting noise from other sources. This characteristic is particularly useful in environments with background noise, such as crowded events or outdoor settings.In conclusion, the directivity index is a fundamental concept in audio engineering that helps define how sound is distributed in space. It serves as a critical tool for engineers and designers to optimize sound systems for various applications. By understanding and applying the principles of the directivity index, professionals can enhance the auditory experience, ensuring that sound is delivered with clarity and precision, regardless of the setting. As technology continues to evolve, the importance of the directivity index will likely grow, paving the way for even more innovative audio solutions in the future.

在声学和音频工程领域，directivity index（指向性指数）的概念在理解声音从源头投射的方式中起着至关重要的作用。directivity index 是一个量化声源方向特性的指标，它表明在特定方向上辐射的声音能量与从所有方向发出的总声音能量的比率。这个参数对于设计扬声器、麦克风和其他音频设备至关重要，因为它直接影响到不同环境中声音的清晰度和质量。要理解directivity index的重要性，首先必须认识到全向声源和方向性声源之间的区别。全向声源在所有方向上均匀辐射声音，因此其directivity index为0 dB。相反，高度方向性的声源将声音能量集中在特定方向，从而导致更高的directivity index。例如，抛物线麦克风具有高directivity index，使其能够捕捉来自特定方向的声音，同时最小化来自其他角度的噪声。directivity index通常以分贝（dB）表示，可以使用公式计算：DI = 10 log10 (D / W)，其中D代表所需方向上的声功率，W代表声源的总声功率输出。更高的directivity index表示声音投射更加集中，这在许多应用中都是有利的，例如公共演讲、现场表演和录音会话。了解directivity index在考虑声音使用环境时也至关重要。例如，在音乐厅中，空间的设计和扬声器的放置会显著影响听众对声音的感知。通过利用具有适当directivity index的扬声器，声音工程师可以确保音乐或演讲在整个场馆中清晰可闻，避免回声或死角等问题。此外，directivity index不仅适用于声源，也适用于接收器，例如麦克风。定向麦克风的设计具有特定的directivity index，以便从特定方向拾取声音，同时拒绝来自其他来源的噪声。这一特性在背景噪声较大的环境中尤为有用，例如拥挤的活动或户外场合。总之，directivity index是音频工程中的一个基本概念，有助于定义声音在空间中的分布。它作为工程师和设计师优化各种应用声音系统的关键工具。通过理解和应用directivity index的原理，专业人士可以增强听觉体验，确保声音无论在何种环境中都以清晰和精确的方式传递。随着技术的不断发展，directivity index的重要性可能会进一步增加，为未来更创新的音频解决方案铺平道路。