Occlusion effect takes place when the ear is stopped in and patient feels they are in a bucket. This is a product of not having enough ventilation to the ear-canal. Noise-cancelling headphones can you this perception due to the blockage of sounds around you. You are feeling cut off from the world around you. It is not the same exact thing as having something stuffed inside your ear. Proper fitting of hearing instruments can limit the occlusion effect. How ever not much can be done for earphones unless they are custom made for your ear, which would allow us to put vents in to get rid of the plugged feeling.
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