The word 笑声 is formed by directly combining two meaningful characters: 笑, which depicts the action and expression of laughing, often visualized with a smiling face, and 声, which represents a sound or voice, historically picturing a musical stone and an ear. Their union creates a single, evocative concept where the first character provides the source (laughing) and the second character specifies its audible manifestation (sound), fusing together to conceptually point to the very phenomenon of "the sound of laughter".