Hearing loss can touch every corner of a person’s life — from communicating with loved ones to staying aware of important sounds in your environment. For many, hearing aids can be life-changing tools. But they deliver their full benefit only when fitted and fine-tuned properly. These days, more and more people buy hearing aids from places other than trained audiologists — like hearing aid retailers, online stores, or over-the-counter kits you fit yourself. But does it really make a difference...