I was teaching a year 8 group a physics topic about sound last week.
Not taught physics for a couple of years, so was quite surprised/disappointed when I got out a signal generator and rigged it up to a speaker (and white board display) so that the pupils could see the waveforms and relate to the sounds they were hearing.
Last time (about four or five years ago) I could hear the sound up to about 14KHz, last week only 10KHz (although "aware" of "something" at higher frequencies.
As usual most of the kids were still hearing at 16 KHz+
OK I know that hearing of high frequencies drops off with age but why is it that I noticed tonight that U2 were sounding a bit "shreechy" on my system - adjusted tracking weight up a bit and everything sounds better again - is it down to harmonics/distortion? I thought that I should be blissfully unaware of this given my limited high frequency perception
hearing - what is going on!
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Re: hearing - what is going on!
I did have them syringed about ten years ago - you may have a point, after syringing I could hear my fingers rubbing on rough surfaces, will ask nurse at local surgery whether she can fit me in
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Re: hearing - what is going on!
Hearing loss often isn't just a matter of not being able to hear particular frequencies.
It seems that one can lose the ability to hear certain harmonics related to frequencies you can hear.
It seems that one can lose the ability to hear certain harmonics related to frequencies you can hear.
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