Vocal characteristics refer to the unique qualities of a person's voice, including pitch, tone, volume, and timbre. Pitch indicates how high or low a voice sounds, while tone describes the emotional quality or color of the voice. Volume measures how loud or soft the voice is, and timbre differentiates one voice from another, even if they share the same pitch. These characteristics can be influenced by various factors, such as age, gender, and health. For instance, a child's voice typically has a higher pitch compared to an adult's voice. Additionally, vocal training can enhance or modify these characteristics, as seen in professional singers or actors.