Is this allowed?

"...is a stretched or tensioned tissue that resonates when sound waves strike its surface, causing mechanical stresses that are then transmitted by nerve receptors to the brain as sound."

They don't mention it in the episode. This isn't supposed to be a real world encylopedia, right? Maybe it should read:

The tympanic membrane is a part of the Ferengi ear. (DS9: "Bar Association")

That's all the canon thats in it. I've seen other articles where real world information is mixed in, but I've also seen articles where it is removed because "This isn't an encyclopedia." --Bp 03:13, 3 April 2006 (UTC)