1844, "pertaining to the ear"
from Latin auris "the ear as the organ of hearing"
By 1860, "received or perceived by ear"
aural adjective / ˈɔr əl /
- of or relating to the ear or to the sense of hearing
"On the day of the first event, which was festively adorned and of alluring aural amplifications, even the weather played along. Everything was poetically perfect, not least the virtually impeccable man who stepped into the garden."
"Originals"
(Speed Well Dialogues)
by Sabina Nore
binaural adjective
"pertaining to both ears," 1857, from Latin bini "twofold, two apiece"
Lore 
