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monito 17th January 2013 07:00 PM

Personal EQ & AMP for Hearing loss
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Hello DIYAudio group!

I am looking to build the ultimate personal amplifier. I lost my hearing at a very young age and have always struggled with listening to audio output from phones, computers, MP3 etc……. When I have my hearing aids in and try to listen its even worst! I would like to build an audio amplifier with a programmable equalizer 7 band equalizer! It will be connected to the 3.5mm audio output jack I will connect +5V separately. For programming the device will be connected to the PC temporally through the USB jack and then removed. Looking for details and suggestions. I would like to discuss if 1 stage amplifier enough? Is it better to amplify first then equalize or the other way equalize then amplify. Who makes the best audio chips? What software is needed to program the EQ is it possible? Any suggested readings, websites, software, forums, etc……..

Easy to build and program! Must be like using a chip like Monolithic Linear integrated circuit LA3600

Input voltage: 5V
Gain: ?
Equalizer: 7 band or better
Input/ Output: 3.5mm

And for the hard way using a DSP or FPGA to build a advanced equalizer/ gain headset that could be used in any computer, phone or MP3 player!

Thanks in advanced!

Mooly 17th January 2013 07:12 PM

This isn't really answering your question which is difficult tbh. A lot depends on the type of hearing loss I guess.

Anyhow, something like this can make a big difference if you have high frequency loss. Post #23

I've just noticed your other thread which I'll delete :)

monito 17th January 2013 07:24 PM

That thing is a monster! But has a great looking plot! I was looking for something much smaller. It doest need to have the curve. I just want to do simple adjustments through an EQ and add some gain to a headset. The output is way to low from most devices.

Mooly 18th January 2013 06:39 AM

How about using a cheap graphic equaliser intended for car use. There's enough room in those to add a small headphone amp. I actually did this a long time ago before building the "monster" above which provides greater clarity for speech. You wouldn't be able to get such a curve from a simple electronic solution (like a graphic).

(Most of the complexity of the design is the triac switched PSU and ultra low power audio detection circuit and the capacitive touch switch)

Mouspikpis 8th May 2013 05:27 AM

Get an audiogram first.

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