Bronchial breath sounds are the sounds of breathing over the large airways that doctors listen for with a stethoscope, according to Easy Auscultation. These breath sounds are hollow, tubular sounds that are louder than vesicular breath sounds. Bronchial breath sounds are also higher-pitched than vesicular breath sounds.
Vesicular breath sounds are heard when listening to the surface of the lungs, according to Easy Auscultation. On inhale, these sounds are a low-pitched rustling at a higher intensity than on exhale. On exhale, intensity fades, and the sound disappears quickly. Bronchial breath sounds are even in length on inhale and exhale. Vesicular breath sounds are two to three times longer on inhale versus exhale.