Oh yeah, and it at least shows that different systems have different ranges and also clarity for those ranges. Hmmm, I'm not sure that's that bad, but try the breathing thing, see if you can get higher than that!
Also, this is definitely not something you can compare to a professional's opinion on the quality of your hearing and if you need a hearing aid or not, it's just a fun little thing you can do.
Speaking of fun breathing techniques and their results, there's a very interesting one that can improve your ability to hold your breath. Basically, if you can hold your breath for 30 seconds now, within half an hour of practice, you can hold it for 3+ minutes easily.
Edited by Zucadragon, : Just added more breathing!