More than what bare rock can tell

"Hark! Nazgul approach" cried Legolas. "How do you know?" asked Aragorn, dropping to the ground and getting his ear even dirtier (again) as he listened to the ground. "A fine excuse for a nap again", grumbled Gimli. "Do your Elvish ears hear it in the earth?", asked Aragorn." and I heard that!" "No, no, just listen to the soundtrack, it is easier & cleaner.", replied Legolas."You can tell by hearing the Nazgul Galloping Score. Rather inspiring, in a darkish sort of way." Gimli spoke up. "Actually, I -" " Yes,yes, I know." Legolas rolled his Elvish eyes."You prefer the Balrog Khazad-dum Doom Doom Doom Drummy Thingy."