Had my hearing test last week. Up to about 4000 hz left is down about 30 db and right about 20-25db. Then graph falls sharply to -90db at 6000hz then up to -80 at 8000 for both. I noticed the hearing test is only at 250, 500, 1000,2000,4000, 6000 and 8000. I'm presently trying a very basic set of aids and finding an exciting improvement in my loudspeakers! Depth, width and detail in sound all vastly improved :)