Okay, here are a few description options for the WordPress post tag “次聲波” (Cìshēngbō, meaning infrasound) in Traditional Chinese, taking into account different levels of detail and potential target audiences:

**Option 1: Concise & Functional**

* **Description (for general use):** 用於描述聲波頻率低於人類聽覺範圍的文章。 (Yòngyú miáoshù shēngbō pínlǜ dīyú rénlèi tīngjué fànwéi de wénzhāng.) – *Used to describe articles about sound waves with frequencies below the human hearing range.*

**Option 2: More Informative**

* **Description (for a slightly more technical audience):** 次聲波：音波頻率低於 20 赫茲 (Hz) 的非可聽聲。涉及地震、火山爆發、風暴等自然現象，以及某些工業應用。 (Cìshēngbō: yīnbō pínlǜ dīyú 20 hèzī (Hz) de fēi kě tīng shēng. Shejí dìzhèn, huǒshān bàofā, fēngbào děng zìrán xiànxiàng, yǐjí mǒu xiē gōngyè yìngyòng.) – *Infrasound: Inaudible sound waves with frequencies below 20 Hertz (Hz). Relates to natural phenomena such as earthquakes, volcanic eruptions, and storms, as well as certain industrial applications.*

**Option 3: Engaging & Broad Audience**

* **Description (for a general and curious audience):** 潛藏耳邊的低吼：探索次聲波的奇妙世界！了解人類聽不見的音波如何影響世界，從地震到大型動物的交流，再到科學家的研究。 (Qiáncáng ěrbiān de dīhǒu: tànsuǒ cìshēngbō de qímiào shìjiè! Liǎojiě rénlèi tīng bù jiàn de yīnbō rúhé yǐngxiǎng shìjiè, cóng dìzhèn dào dàxíng dòngwù de jiāoliú, zài dào kēxuéjiā de yánjiū.) – *The rumble lurking in our ears: Explore the amazing world of infrasound! Discover how these inaudible sound waves impact the world, from earthquakes to the communication of large animals, and the research of scientists.*

**Option 4: SEO-Focused (Optimized for Search Engines)**

* **Description:** 次聲波 (Cìshēngbō) 是一種頻率低於 20Hz 的聲波。本標籤下的文章探討次聲波的特性、來源、應用，例如地震監測、氣象預報，以及某些動物的通訊方式等。 立即探索次聲波的奧秘！ (Cìshēngbō (Cìshēngbō) shì yī zhǒng pínlǜ dīyú 20Hz de shēngbō. Běn biāojiān xià de wénzhāng tàn tǎo cìshēngbō de tèxìng, lái yuán, yìngyòng, lìrú dìzhèn jiāncè, qìxiàng yùbào, yǐjí mǒu xiē dòngwù de tōngxùn fāngshì děng. Jíshí tànsuǒ cìshēngbō de àomì!) – *Infrasound (Cìshēngbō) is a sound wave with a frequency below 20Hz. Articles under this tag cover the properties, sources, and applications of infrasound, such as earthquake monitoring, weather forecasting, and the communication methods of certain animals. Explore the mysteries of infrasound now!*

**Key Considerations when choosing:**

* **Your target audience:** Are you writing for experts or the general public? Choose a description that matches their level of knowledge.
* **The content of your posts:** Does your blog cover only technical aspects, or will it be more general and accessible?
* **SEO goals:** If you want to rank highly in search results, optimize the description with relevant keywords like “次聲波”, “地震”, “科學” (earthquake, science), etc.
* **Length:** WordPress typically doesn’t have a strict character limit for tag descriptions, but keeping it concise helps with readability and clarity.

Remember to enter the description into the “Description” field when creating/editing the tag in your WordPress admin panel. Good luck!