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.
Mucus' other function, though, might surprise you. Mucus is kind of like flypaper, Ellis says. Debris that comes into the nose or throat sticks to it, and then you swallow it, so it doesn't get into your lungs.. Mucus, in other words, is nature's filter for your delicate lungs.