directivity

directivity的音标为[ˌdɪrɪˈktɪvɪtɪ]或[ˌdɪərɪkˈtɪvɪtɪ]，意思是方向性或指向性。

基本翻译为“指向性；方向性；辐射强度；灵敏度”。

速记技巧可以是通过调整声音的音量、音调、音色和音长等方式来增强声音的指向性，从而更好地传达信息。

需要注意的是，这只是directivity的音标和基本翻译，如果需要更多信息，建议直接查阅相关资料。

Directivity这个词的词源可以追溯到拉丁语directus，意为“朝向的，面对的”。它的变化形式包括名词的直接性（directness）和动词的直接化（direct）。相关单词包括：

1. Oblique vision（斜视）：这个词表示眼睛从侧面或斜着看，与直接视线不同。

2. Indirect approach（间接方法）：这个词表示通过间接的方式解决问题或达成目标，与直接方法相对。

3. Direct speech（直接表达）：这个词表示不经过翻译或转述，直接表达原意。

4. Direct action（直接行动）：这个词表示采取直接、有效的方式行动。

5. Direct marketing（直接营销）：这个词表示通过直接向消费者推销产品或服务的方式。

6. Directed speech（有目的的言语）：这个词表示有特定目的或意图的言语表达。

7. Directed light（定向光）：这个词表示光线朝向某个方向，通常用于摄影或照明中。

8. Directivity factor（指向性系数）：这个词用于描述某种设备或系统在特定方向上的性能。

9. Directivity pattern（指向性模式）：这个词用于描述某种设备或系统在空间中的辐射或反射模式。

10. Directivity gain（指向性增益）：这个词用于描述某种设备或系统在特定方向上的性能相对于其他方向的性能。

这些单词都与directivity这个词有着密切的联系，它们在不同的语境中描述了不同的概念和方法，体现了直接性的重要性和多样性。

常用短语：

1. directivity factor

2. beamwidth

3. beamforming

4. omnidirectional

5. omni-directional

6. gain pattern

7. pattern control

例句：

1. The antenna has a narrow directivity beamwidth, making it suitable for precise pointing.

2. The speaker array exhibits a highly directive pattern, delivering sound with pinpoint accuracy.

3. Beamforming technology allows for precise control over the directionality of the signal.

4. An omnidirectional microphone captures sound equally well in all directions.

5. Omnidirectional microphones are often used in environments where directionality is not necessary.

6. The gain pattern of the antenna indicates its sensitivity to signals received from different directions.

7. Pattern control is essential for achieving optimal performance in complex environments.

英文小作文：

Directivity and its Impact on Communication Devices

Directivity is a key feature of many communication devices such as antennas, microphones, and speakers. It allows these devices to focus their signal in a specific direction, delivering improved performance and greater accuracy in signal transmission and reception.

For instance, antennas with narrow directivity beams are suitable for precise pointing and can improve the signal-to-noise ratio by reducing interference from external sources. Omnidirectional microphones, on the other hand, capture sound equally well in all directions and are often used in environments where directionality is not necessary.

Beamforming technology, on the other hand, allows for precise control over the directionality of the signal, delivering high-quality sound in a specific direction without sacrificing performance in other directions. This technology is commonly found in headphones and speaker systems.

Overall, directivity plays a crucial role in enhancing the performance of communication devices and ensuring optimal signal transmission and reception in a variety of environments and conditions.