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The syrinx is the equivalent of the human larynx. It is deep inside the parrot's body, where the voice box meets the bronchial tubes. It branches in two directions, each branch opening into a bronchus. Air from the lungs passes through the syrinx and all of the air is used to produce sound. One or both sides of the syrinx can produce sound, and in fact, it can produce two tones at the same frequency at the same time. The sound quality is affected by the neck muscles, length of the windpipe, structure of the beak and various movements. Overall, the complexity of the syrinx and the number of muscles affects the complexity of a parrot's sound.

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13y ago

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