How does the mechanism of production of sounds in birds differ from that in human beings?

In the human voice box, or larynx, air from the lungs is pushed past the vocal cords, which then start moving back and forth sideways like a flag fluttering in the wind. With each oscillation the larynx closes and opens, making the airflow stop and start, which creates sound pulses. Instead, birds produce sound using an organ unique to birds called the syrinx that is located deep in the body and therefore very difficult to study Both songbirds and humans are not born with the ability to speak or sing, but must learn their language or song by listening to others, a process called vocal imitation learning or simply vocal learning