I've been asked to design a circuit to power up and pick up the signal from a Knowles NR23158 microphone that is going to be used to record mosquitoes in a lab.
If I plan to connect this microphone to a professional computer sound card that has its own pre-amps (like an M-Audio USB Audio Interface or alike), do I still need to design an amplifier circuit for the microphone or will the pre-amps from the sound card do?
Is a conversion from the unbalanced signal that the microphone outputs to a balanced signal needed? (The sound card has both balanced XLR and unbalanced TS inputs and the sound card would be located next to the microphone, so I don't think interference would be a big problem).
Thank you very much.
You might want to get in contact with James Hartley at the University of Brighton. He has built boards for me for that microphone, which I used to record mosquito flight tones. Unless you are recording from tethered mosquitoes that style of microphone (near-field) may not be best suited to your needs. We ended up using a sensitive studio microphone and a parabolic dish to capture swarming mosquitoes.
We used a external sound card Emu-0404 USB which digitised the signal before it went into the computer.
Hello, did you find a suitable amplifier schematic? I have exactly the same problem and I can't find any such schematics online.
- Badges
- Science topic
- Similar topics
- Control Systems Engineering
- Filtering