Needless to say I was extremely disappointed in my results. But, as an excuse, I have old crappy headphones, live next to a busy street and there is street construction going outside. I plan to find some decent headphones and try it again in a quiet place, but I don't expect significantly different results. (- sigh -) Fortunately the top note on a piano, (C8), is only around 4186 Hz. Well below where my HF degradation started to kick in. (Whew!) Still... Enjoy. I expect reports. -- Geoff Sykes -- Assoc. Los Angeles Geoff, I was trying to find this post again, when I wrote the last one. Finally I got it and want to mention something else. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Congratulations on finding a way to start taking charge of your own hearing conservation program!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! The first step is to monitor your hearing regularly( keep a record of the results), the second is to learn what your findings mean, the third is to learn how to protect it and the fourth is to protect it. Your high frequency degredation-----how high is it?-----is usually an early warning sign of hearing loss caused either by ototoxicity (things that are toxic to our ears, such as certain medicines or chemicals), or by noise (any too loud sound). There is another way to have the ultra high frequencies tested--it's called testing for DPOAE's, or Distortion Product Otoacoustic Emissions. It's a test that audiologists do that measure a sound that is caused by the outer hair cells of the cochlea and emitted out of the ear, when two frequencies are introduced into the ear. So, when anyone goes to an audiologist, who will probably only test your hearing to 8000Hz. with their audiometer, you can ask them to test the DPOAE's for higher frequency results. Be sure and tell them to test the extended high frequency range. I gave a class on hearing to the Portland chapter, PTG several years before moving here. In it I mentioned medicines that are ototoxic. A short while after joining the Portland chapter, one of the members came to me and thanked me. He said that, as a result of my former talk, he had gone to his doctor and told him to take him off the quinine that he was taking for leg cramps. He said that within four days his tinnitus had stopped and his hearing had returned to normal. Knowledge is power. Diane
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