The development of your voice is a gradual process that extends beyond your teenage years, typically reaching maturity around the age of 20 for females and 22 for males.
While most individuals experience significant voice changes during puberty, the vocal cords continue to mature and refine throughout early adulthood. This ongoing development contributes to the final, stable quality of your voice.
Factors such as genetics, hormones, and individual experiences can influence the exact age of vocal maturity. However, the timeframe mentioned above provides a general guideline.
It's important to remember that voice development is not solely about reaching a specific age. Proper vocal technique, care, and healthy habits play a crucial role in maintaining a healthy and strong voice throughout your life.