I went upstairs and checked my hearing aid box. It's Resound. Seems wrong. I had an in-the-ear type first that was different from the looped, behind the ear ones I have now. The first one (in-the-ear) was not good. Had back feeding when you covered your ear (and this was the only way you could tell it was working); so, couldn't use with a telephone.
These I have now are mid price models, about $2300 each, in both ears. The audiologist had done a couple different programs. One kinda kicks up the volume about 3 dB and cuts out some background noise. I use it in crowds and meetings. Another program just cuts out background noise. Works in the bowling alley. She also checked my tinnitus by matching level and frequency. It's 85 dB. These also play a tune when you push the battery compartment back in with a new battery or from having laid them aside for a while. That's important. There are 2 or 3 ways they can not work other than a dead battery. Oh, they sing out "battery" two times before the batteries go dead. A good audiologist will do all this for you. After the first year, she brought me in to check them. Sent one at a time back for a rebuild. Don't know whether she'll be doing this for the 2nd year.
Even with all this, I don't hear like my wife. Need good eyes to read the captions on TV. Got my eyes back after a YAG on my 2nd eye to get a secondary cataract. **** doctor misdiagnosed the 2nd eye to get this with wrinkled cornea, and I struggled with my quirky left eye for 3 or 4 months before a cornea specialist said, "I don't see a wrinkle. I think you have a secondary cataract." He shot a hole through it. Can read ALL the fine print on the TV at 15-20 feet now, even pesky score sheet on ESPN.
Ralph