What is an abnormal respiratory sound heard on auscultation?

An abnormal respiratory sound heard on auscultation, particularly during inspiration, is known as a wheeze. Wheezes are high-pitched, whistling musical sounds that indicate obstruction or narrowing in the airways, often due to bronchoconstriction or the presence of secretions. They typically occur when there is difficulty in breathing due to conditions like asthma, bronchitis, or chronic obstructive pulmonary disease (COPD). Wheeze sounds are important indicators of respiratory distress and require further investigation to determine the cause and provide appropriate treatment.