When a sound wave first arrives at the ear, the wave is directed toward the auditory canal by the pinna.
The outer ear is made up of the pinna and the external auditory canal (EAC).
The pinna is a structure made up of cartilages covered with skin, the cartilages are given different names, the most important being the helix, antihelix and the tragus.
In general, pinna acts as a receptor for sound waves, capturing them and sending them through the external auditory canal.
That is, it conducts sound waves into the external auditory canal, amplifies pressure and protection.
Therefore, we can conclude that when a sound wave first arrives at the ear, the wave is directed toward the auditory canal by the pinna.
Learn more here: https://brainly.com/question/17837676
