The Larynx is the voice box that allows us to speak, shout, whisper and sing. the larynx consist of a cartilage skeleton that houses the vocal cords, that are covered by a mucus lining. Muscles inside the larynx adjust the position, shape, and tension of the vocal cords, allowing us to make different sounds from whispering to singing. Any change in the air flow (which is generated by the lungs exhaling air) across will affect the voice and the quality of sound.

Laryngitis (larynx + itis = inflammation) is an inflammation of the voice box, causing a person to loose their voice. The quality of the voice becomes hoarse or gravelly-sounding or even too quiet or soft to hear. Laryngitis usually comes on suddenly and gets worse during the first 3 days. Read more at;
http://teevibeblog..com.ng/2017/06/let-talk-about-laryngitis.html