what are normal percussion sounds over the stomach
an area of hyperresonance on one side of the chest may indicate a pneumothorax. tympanic sounds are hollow, high, drumlike sounds. tympany is normally heard over the stomach, but is not a normal chest sound. tympanic sounds heard over the chest indicate excessive air in the chest, such as may occur with pneumothorax. tympanic sounds over the bladder indicates a full bladder.