Voice quality refers to the characteristics of a person's voice that make it unique, such as its tone, pitch, and clarity. These attributes can be influenced by factors like age, gender, and health. For example, a child's voice typically has a higher pitch compared to an adult's voice, while a person's vocal quality may change due to illness or fatigue. In fields like speech therapy and music, understanding voice quality is essential. Therapists may assess voice quality to help individuals improve their communication skills, while singers often work on their voice quality to enhance their performances.