This is the useful info I've seen hardware-wise recently: https://medium.com/snips-ai/benchmarking-microphone-arrays-respeaker-conexant-microsemi-acuedge-matri

This is the useful info I've seen hardware-wise recently: https://medium.com/snips-ai/benchmarking-microphone-arrays-respeaker-conexant-microsemi-acuedge-matrix-creator-minidsp-950de8876fda https://medium.com/snips-ai/benchmarking-microphone-arrays-r... https://developer.amazon.com/alexa-voice-service/dev-kits/conexant-4-mic/ https://developer.amazon.com/alexa-voice-service/dev-kits/co... Amazon's 7-mic hardware has its own OEM program.