Try Stretching the Jaw. Some people are more sensitive to pressure changes in the air. Swelling inside the ear canal can cause a loss of hearing that may result in sounds breaking up in a crackling noise.
Deep Coughing: Start by taking a deep breath. Hold the breath for 2-3 seconds. Use your stomach muscles to forcefully expel the air. Avoid a hacking cough or merely clearing the throat. A deep cough is less tiring and more effective in clearing mucus out of the lungs.
Low-grade fever, runny nose, itchy throat, hoarseness, wheezing and initially dry and then productive cough with clear mucus may last from several days to several weeks. Mucus can, in some days, turn to yellow or green (1).