Some hearing aids required a custom earmold. Earmold impressions will need to be taken to order them. This requires a visual inspection of the ear canal. Then, material is inserted into the ear with a foam block to protect the eardrum. This impression material dries in about 5 minutes. The impressions are then sent to the manufacturer to make the earmolds or custom hearing aids. Earmold impressions are also required to make custom earplugs for music, recreational, sleep, and more!