voice box 
noun
The larynx.Giving up smoking will not only prevent several heart diseases but also protect the person from lung cancer, chronic bronchitis and cancer of the voice box, bladder and cervix....
- This is the inflammation and narrowing of the voice box, the main air tube to the lungs, and the larger branching air tubes (the bronchi).
- This features progressive paralysis of the tongue, throat and voice box so that swallowing and speaking become difficult or impossible.