What sound is typically noted upon percussion of the spleen?

Dullness upon percussion of the spleen is typical because the spleen is a solid organ filled with blood, which does not transmit sound waves in the same way that air-filled structures do. When a clinician percusses the area over the spleen, they will encounter a dull sound, indicating the presence of denser tissue rather than air. This dullness differentiates the spleen from surrounding structures that may produce different sound characteristics, such as the tympany associated with gas-filled intestines. Dullness provides valuable information during a physical examination, as it can help indicate the size and condition of the spleen, potentially pointing to conditions like splenomegaly.