Here are a few options for a WordPress post tag description for “分貝” (Fen Bei, meaning Decibel in Traditional Chinese), ranging in formality and focus:

**Option 1: Concise and Informative**

> 分貝：聲音強度的單位。用於衡量聲音的大小，數值越高，聲音越響。了解分貝如何影響您的生活，並探索相關的音頻技術。
>
> *Translation: Decibel: The unit of sound intensity. Used to measure the loudness of sound; the higher the value, the louder the sound. Learn how decibels affect your life and explore related audio technologies.*

**Option 2: More Detailed and Engaging**

> 分貝 (Decibel) 的世界：深入探討這個聲音計量的基本單位。從輕微的耳語到震耳欲聾的噪音，分貝尺度囊括了各種不同的聲音強度。了解分貝的對數特性，以及如何使用分貝來描述環境音量、音響設備的性能、甚至是耳機的輸出功率。掌握分貝，就能更好地理解您周圍的聲音環境。
>
> *Translation: The World of Decibels: Delve into the fundamental unit of sound measurement. From a gentle whisper to deafening noise, the decibel scale encompasses a wide range of sound intensities. Understand the logarithmic nature of decibels and how they are used to describe ambient noise levels, the performance of audio equipment, and even the output power of headphones. Mastering decibels will help you better understand the soundscape around you.*

**Option 3: Focused on the Impact**

> 分貝：聲音的秘密武器。了解過高的分貝如何影響您的聽力健康，以及如何在日常生活中保護自己免受噪音污染。我們探討有關聲音的知識、防護措施和相關的技術。
>
> *Translation: Decibels: The Secret Weapon of Sound. Discover how excessive decibels affect your hearing health and how to protect yourself from noise pollution in your daily life. We explore knowledge about sound, protective measures, and related technologies.*

**Option 4: Short & Sweet**

> 分貝：聲音的強度單位。
>
> *Translation: Decibel: The unit of sound intensity.*

**Which one to choose depends on:**

* **Your Blog’s Purpose:** Is it technical, educational, or more general?
* **Your Target Audience:** How much background knowledge do they have about sound?
* **The Tone of Your Blog:** Formal, informal, informative, etc.

Remember to tailor the description to your specific content and target audience. Good luck!