Final answer:
Wheezing is the musical, squeaking, or whistling sound that may be heard on inspiration or expiration while auscultating lung fields. It is a common symptom of asthma.
Step-by-step explanation:
The musical, squeaking, or whistling sound that may be heard on inspiration or expiration while auscultating lung fields is known as wheezing. Wheezing is a common symptom of asthma, a chronic respiratory condition characterized by inflammation and narrowing of the airways. It is caused by the turbulent airflow through the narrowed airways, resulting in the production of high-pitched sounds.