[R-390] Audiophools - hearing loss

[Scott, Barry (Clyde B)]

I think my Pete Townshend/Jimi Hendrix "notches" are more like a good low-pass filter.  :(

Barry(III) - N4BUQ

>  
>  High frequency loss isn't the only the only type of hearing loss.
>  
>  Years ago back in my ET days I had a boss who was an audio 
>  guru, and he told
>  me of a phenomena called "shooters notch", which is a notch 
>  in the ear's
>  frequency response around 4 KHz (as I remember). The name 
>  kind of explains
>  how you get it.
>  
>  So a couple of months ago I was playing around with a new 
>  set of head phones
>  I picked up and had them hooked up to an audio signal 
>  generator, and sure
>  enough I found I have a nice deep notch in my left ear right 
>  about at that
>  frequency. Dam!
>  
>  Testing your own hearing frequency response is easy with a pair of
>  headphones and a sig gen,
>  lab quality gear is not required. The trick is to only make 
>  the tone just
>  loud enough to hear, and change the frequency slowly; that 
>  way any roll-off
>  or notches are easily noticed.
>  
>  
>  John