Asthma makes more common sounds than wheezing sounds, also called croup, but the degree of development of the specific condition and the severity of the symptoms are related. Asthma is a chronic inflammatory disease of the airways. During an asthma attack, bronchial constriction and spasm can occur, resulting in narrowing of the airways and restriction of airflow, thus producing vibrations that cause sounds. The sound is similar to a bird’s call or a flute, so it is also called a whistling sound. However, because asthma is often combined with infections, fluid is formed in the narrowed airways, creating a vortex that produces a wheezing sound, a mixture of dry rales and wet rales, somewhat similar to cat wheezing, also known as cat wheezing. There are also some manifestations of dry snoring sounds, similar to the symptoms of snoring. In mild asthma, the symptoms are mostly chest tightness without wheezing sounds. Some people with very severe asthma can also not hear croup or even breathing in their lungs and present as silent lung.