A<unk> , or simply<unk> <unk> , is an audible medical sign present in some patients with pleurisy and other conditions affecting the chest cavity. It is noted by listening to the internal sounds of the body, usually using a stethoscope on the lungs.<unk> s are the squeaking or grating sounds of the<unk>  linings<unk> bing together and can be described as the sound made by treading on fresh snow. They occur where the<unk>  layers are inflamed and have lost their lubrication.<unk> <unk> s are common in pneumonia, pulmonary embolism, and pleurisy (pleuritis). Because these sounds occur whenever the patient's chest wall moves, they appear on inspiration and expiration.
Pleural friction rub
Subcutaneous emphysema
Subpulmonic effusion
Pulmonary consolidation
Bronchophony
Pulmonary infiltrate
Sail sign of the chest
Diaphragmatic paradox