TheLaw
100+ Head-Fier
- Joined
- Sep 19, 2010
- Posts
- 193
- Likes
- 10
Hello,
Working on a little "hearing aid" project.
The mic will be on the same board as everything else so it's not a matter of long cable runs and picking up noise on the way etc.
I have a question about how the different stages should be laid out.
Currently I have been thinking: Electret Mic->LC/RC filter -> Mic Preamp -> 3-Band equalizer -> Headphone amp -> Headphones
Is this the correct order? Does the filter go somewhere else? I want to bandpass 100-3000Hz.
Do I need a preamp? Can I run the signal of the electret directly into the equalizer? Is that a bad idea for some reason?
Preamp, equalizer, and head amp will all be op-amp based.
Thanks!
Working on a little "hearing aid" project.
The mic will be on the same board as everything else so it's not a matter of long cable runs and picking up noise on the way etc.
I have a question about how the different stages should be laid out.
Currently I have been thinking: Electret Mic->LC/RC filter -> Mic Preamp -> 3-Band equalizer -> Headphone amp -> Headphones
Is this the correct order? Does the filter go somewhere else? I want to bandpass 100-3000Hz.
Do I need a preamp? Can I run the signal of the electret directly into the equalizer? Is that a bad idea for some reason?
Preamp, equalizer, and head amp will all be op-amp based.
Thanks!