What is the general shape of the ear canal?

The ear canal is generally characterized by an S-shaped curve. This distinctive shape helps to optimize sound transmission from the outer ear to the eardrum. The S-shape also serves a functional purpose, as it protects the inner structures of the ear from environmental factors such as debris and microorganisms. This design allows for some flexibility and adaptation to the varying sizes of ear fittings like hearing aids and earplugs, facilitating a better fit and enhancing user comfort.