With many hearing aids and Hearing impaired equipment for the hard of hearing, the problem is that all sounds can be heard, not only the one you need to hear, such as the person you’re conversing with. This problem is typically intensified by poor room acoustics. It is hard for normal hearing folk to comprehend this difficulty.
A hearing aid is different from the human ear, as it can’t filter out unwanted noises. While glasses can correct sight, hearing aids don’t absolutely correct hearing loss.