Laryngitis

Laryngitis was the inflammation of the larynx.

While making repairs to K9's brain circuit, the Fourth Doctor was surprised to find that K9 had contracted laryngitis. It caused K9 to speak with a hoarse, strained voice. He was left aboard the TARDIS to recover. (TV: Destiny of the Daleks, City of Death)

Melanie Bush was suffering from laryngitis when she helped the Sixth Doctor track down an alien insect. (PROSE: The Eyes Have It)