Deane, many of us have been through what you have described. Medically, men tend to lose high frequency sounds, while women tend to lose low frequency sounds - it just a part of the aging process, and most of us on this forum are not youngsters (Well there are exceptions, of course).
Eddie is correct in telling you to contact an audiologist - they are professionals in the field and know how to help this problem. However, in the world of medicine, audiology is one of those fields that can decimate a significant chunk of your bank account and not produce outstanding results. Now, if you are a veteran, a big chunk of this can be taken care of at the Veterans Administration, but you must use their facilities and physicians. They too are highly trained in the field and can provide the same services as those in the outside world. The difference is the out of pocket funds.
If you are not a vet, every audiologist out there will tell you that you need hearing aids for both ears - not just one. In some instances, such as Eddie's case, this may be true. In others, it's not the case, such as mine. I got along just fine with just one aid in my right ear, the ear that had the most damage from being a first loader on a 3-50 anti-aircraft gun on the USS Newport News. Back then, we had no hearing protectors, so most of us just shoved wads of cotton into our ears to lessen the blast that was just a few feet away from our heads. The fun fired 60 round a minute and the concussion was unbelievable to say the least. I still have severe tinnitus from this, which will never go away.
One thing to keep in mind, if the problem is strictly volume, this can be something as simple as a chunk of wax resting against the tympanic membrane, something is easily corrected by ear drops used specifically to dissolve the wax.
If wax is not the problem, then an inexpensive ear bud can solve your problem. Those $39 hearing aids that you see advertised will also solve a simple amplification problem, and some even have EQ adjustments on them.
Good luck,
Gary