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I have just received new and better hearing aids. My audiometrist tested my hearing and produced a graph of hearing loss over a number of frequency bands. My new aids were adjusted to amplify the individual bands by an amount necessary to bring them all to the same level. Fantastic result. Why can the same technique not be used with a pair of earphones? It should be possible to design a reasonably compact two channel amplifier with frequency filtering and a series of frequency specific volume controls. This would be plugged into the audio source and the earphones plugged into the amlifier. If the volume controls were calibrated, it could be adjusted either to specifications obtained from ones audiometrist or to personal taste. Any electronics whizz out ther prepared to have a go?
It's possible to do this.The 'intelligent' circuit must be bypassed though(but keep the specific audio curve <eq> for the person) in order for the person to have a hi-fi experience, and the amplifier input must have a switch(digital or analog) which can select microphone or 'direct stereo socket' source to listen.
Anyway, the person must be careful to tune loudness from the hi-fi sound source and keep away from cellphones and other powerfull electromagnetic sources .
By sarsol
Thanks for reply. You talk about bypassing the intelligent circuit. This suggests that I am still wearing the aids? My intention is to remove the aids and wear the earphones in lieu. What I now need is a circuit diagram. Any chance?
If you want to listen to music without your aids, you may use some powerful headphones (along with a eq setting,on a computer music player) connected to an amplifier like those in desktop speakers, but the output for the speakers must be the output for the phones, in order for the headphones to sound impressive...this requires some basic electronics knowledge-or buy the amp-or ask a technician to help you.
Some hearing aids have DAI (Direct Audio Input), which means you can directly connect them to a cd-player or other sound source, offering a good audio experience.
I'm not a specialist, so you'd better consult your audiometrist first.

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