What is the typical percussion sound when assessing the liver below the umbilicus?

When assessing the liver below the umbilicus, the typical percussion sound is dullness. This is because the liver is a solid organ, and when percussed, it will produce a dull sound, indicating that it is denser than the surrounding structures. The dullness occurs as the sound waves are absorbed rather than resonating, which is characteristic of solid structures within the abdomen.

The other sounds mentioned, such as tympanic sounds and resonance, are typically associated with hollow organs filled with gas or fluids, such as the stomach or intestines. Hyper-resonance might occur in conditions like pneumothorax due to excess air, but it is not applicable to the liver. Therefore, recognizing that the liver produces a dull percussion note helps in the proper evaluation and understanding of abdominal anatomy and pathology in clinical settings.