One more type of electronic hearing aid is the disposable cochlear implant. Unlike the other devices, this one requires surgery. With this particular type of device, the surgeon makes an incision inside each ear so that he can place the wires inside. Afterward, they are placed inside the ear canal to transmit the signal. These are the only hearing aids that do not need batteries. There are still more types of conductive hearing loss treatment options. For instance, many people opt for the use of in-ear hearing aids. This is done by having tiny devices actually inserted within the inner ear. These devices are controlled by a set of plastic earplugs, which keep unwanted external noise out. Ear infections are another concern with this type of treatment, so your doctor will probably want to perform a follow-up exam to make sure there are no problems.