The word "叫声" is formed as a verb-noun compound, where the first character "叫" (jiào) means "to call" or "to shout", acting as a modifier, and the second character "声" (shēng) means "sound" or "voice", serving as the core noun. Together, they combine to create a specific nominal meaning: "the sound of a call" or "a cry". This structure is common in Chinese for specifying a type of sound by indicating its source or action, such as the call of an animal (e.g., a bird's chirp) or a shout from a person.