Speech Recognition:

I changed the IIR filters to Resonators centered around 600hz, 1250hz, and 3150hz and now have double the signal-to-noise with more stable numbers.

This amplifies the signal for certain types of sounds, but in order for this to work I feel like I need about 10 filters, centered around different frequencies.

Signal is only 12.5%-25% over noise background, and you need to speak close to the mic, so SNR needs to be improved by at least twice again to work.