These go directly in the canal. they are typically made of foum,wax or silicone.Some ear plugs are individually milded for custom fit.
These surround the outer ear and block out noice by acoustic isolation. Some also come with circuitary that lets you hear low level sound such as speach ,or an active noise reduction system that electronically cancels out noice.
These work by artificially extending the ear canal,drawing sound away from the ear itself and reducing noice evenly across all frequencies.
