Next, they’ll likely use a stethoscope to listen to your lungs as you breathe. Crackling, bubbling, whistling, or rattling sounds could be signs that you have either bronchitis or pneumonia.

“Therefore, we proposed a theoretical system to classify the cough sounds based ... because their sounds can indicate the tissue structure in the throat and lungs, as well as the behavior ...

What It Is: "Chronic bronchitis will sound like a wet productive cough ... What Causes It: Pneumonia is caused by an infection in the lungs that leads to the buildup of fluids in the chest ...

It may range in color from clear to yellow to greenish. People with bronchitis may feel short of breath and hear a wheezing sound as they breathe. Lingering irritation can cause continued coughing ...