It is auscultating the patient’s chest in different field when the child speaks

Method

• Ask the patient to repeat words like ‘Ninety Nine’ continuously in the same tone and voice depth
• Now auscultate the lung in different area like upper lobe, middle lobe and lower lobe.
• Auscultate the same areas simultaneously, i.e. once on the left lung and similar area in right lung
• Listen to the healthy side first and then the affected side

Conditions with dull vocal resonance

• Pleural effusion
• Pneumothorax
• Thick pleura
• Lung fibrosis