Ear Anatomy and Terminology

When discussing critical information about anatomical features and fittings for an earpiece or impression, it helps if the hearing care professional and the lab share common terminology. Below you will find definitions for the most commonly-used terms describing the anatomical features of the ear, as well as illustrations showing those features highlighted on an earpiece. You may find these illustrations and definitions useful when communicating with Westone about the design of your patient's earpiece.

Ear Anatomy

The anatomical landmarks described here are of primary importance to the hearing care professional. Several of these hold special significance for the creation of a proper fitting earpiece.



Antihelix
A ridge of cartilage that is part of the pinna, just above the concha

Antitragus
A ridge of cartilage opposite the tragus

Aperture
The opening of the ear canal

Auricle or pinna
The external ear

Concha
The lower bowl-shaped cavity just outside of the opening of the ear canal

Ear canal
The 2 to 3 cm long external auditory meatus, consisting of an outer cartilaginous portion and an inner bony portion

Heel

The intertragal notch located at the bottom of the concha bowl

Helix lock (curl)

A recessed "crevice" at the upper part of the ear, just above the valley

Tragus
A small ridge in front of the external opening of the ear canal

Valley (earpiece) crus (ear)
The horizontal piece of carti­lage located outside the ear canal that divides the upper and lower parts of the ear