It appears so far in this post, left ears fail more than right ears? I use to think, my right ear was exposed to more direct, loud noises, because I'm right handed. Using power tools, leaf blowers, power washers, chain saws, etc., all skewed noise to my right side. However, using earbuds, headphones, being in loud concerts or clubs, etc., exposed both my ears to the same amount of noise. Guess my left ear is stronger than my right, or as some doctors think, it was a viral attack.
I'll never really know.