The Chinese word **音频** (yīnpín), meaning "audio," is formed through a straightforward compound morphological process, combining two meaningful characters: **音** (yīn), which means "sound" or "tone," and **频** (pín), which means "frequency" or "rate." Together, they logically create a new term that refers to the range of sound frequencies perceptible to the human ear, or the electronic representation of sound. This is a typical example of a **modifier-modified** or **coordinative** compound in Chinese, where the first character specifies the domain (sound) and the second character specifies a key attribute (frequency), resulting in a precise technical/scientific term for the modern concept of audio.