Laryngitis is an inflammation of the mucous membranes of the larynx. Signs of laryngitis include hoarseness and loss of voice. The most common causes are excessive meowing and a chronic cough. Both cause vocal cord strain.
Laryngitis can be associated with tonsillitis, throat infections, tracheobronchitis, pneumonia, inhalant allergies, and (rarely) tumors in the throat. The lining of the larynx is not coated with cilia. Therefore, mucus frequently accumulates in the larynx. Exaggerated throat clearing is needed to dislodge it. This further irritates the larynx and lowers resistance to infection.
You have probably seen your cat vomit from time to time without much concern. Vomiting can be a result of something minor, like a cat consuming his meal too quickly, or it can be a sign of a much more serious condition that requires immediate medical attention. Usually, a cat vomits because he ate something disagreeable, ate too much or played too soon after dinner. Vomiting can also be associated with gastrointestinal or systemic disorders.
Some causes for a sudden episode of vomiting, or ...
Treatment: Laryngitis due to excessive meowing usually responds to removing the cause of the cat’s anxiety or distress. If the problem is due to prolonged coughing, seek veterinary attention to investigate and eliminate the cause of the chronic cough.
WebMD Veterinary Reference from "Cat Owner's Home Veterinary Handbook"