Notch Filter for audio output

[overland]

I, like most adults over 60 who have been involved in industry or music suffer from notch deafness - i.e we have reduced hearing at frequencies around 2000hz and 4000hz - just the frequencies which cause difficulty in understanding speech - particularly in background noise - We require an active filter circuit easily made, to fit into our tv sets (or headphones) which will selectively amplify these missing notches - does anyone have a circuit?

 

[kb7rqq]

Overland,

You might take a look at a product that MFJ builds. It's intended for people with frequency hearing loss to use with amateur (HAM) radio but would work for a muriad of aplications I'd think.

http://www.mfjenterprises.com/products.php?prodid=MFJ-616

In case the link doesn't work.. go to:

http://www.mfjenterprises.com

and search for MFJ-616

It uses notch filters for various frequencies and also DSP technology.

Hope this helps,
Todd KB7RQQ

 

[hacksaw]

Audio filters do just that, cut the bass, cut the highs and turn the volume up. If you have a communications you can do this in the IF circuit and in the audio section.

In effect yo are doing just what hearing aids accomplish.