Unlike eyeglasses, which give you immediate positive results, hearing aids take a little time to adjust to. People learn at different rates. Some people need a few days to adjust to their new hearing aids, but most need a few weeks. When your auditory system is not used to hearing certain sounds, it can be a bit overwhelming when all the sounds come back at the same time. Your brain will need to become reacquainted with these sounds. In general, the greater the hearing loss and the longer the hearing loss has gone untreated, the more difficult the transition to using hearing aids. The most effective way to get used to new hearing aids is constant use. Audiologists are uniquely trained to provide rehabilitative programs that should occur after a hearing aid has been fit.