Voice tremor is a common way to do an examination of the lungs, and clinically voice tremor is diminished. It is mainly common due to excessive air content in the alveoli, such as emphysema, obstruction of the bronchi, obstructive pulmonary atelectasis, seen in large amounts of pleural effusion or pneumothorax, a high degree of pleural thickening and adhesions, and subcutaneous emphysema in the chest wall. Enhanced voice tremor is mainly common in alveoli with inflammatory infiltration, such as lobar pneumonia in solid phase, large pulmonary infarction, huge intrapulmonary cavities close to the pleura, such as tuberculosis with cavity type, lung abscess, etc.