I had my hearing tested 6 years ago, and again a year ago by a different audiologist at a different location. The second test chart looks to be a similar shape (apart from a new dip at 4k), but about 15-20dB higher on the chart than the first through the whole range. Higher on the chart is better, right? I know my hearing has deteriorated in that time, so why would I get better results? Would there be a variation depending on the equipment used or even the audiologist?
I don't have hearing aids yet, but this might be the year.