This page is about making hedge dragon ears (microphones) that work. For Dlexa to have a conversation she needs to
acquire her subjects voices clearly. Any noise will make the STT (speech to text) processing more difficult and less
accurate. Microphone Technology Choice Easy in Theory Things That Did Not Work Next
Microphone Technology ChoiceMicrophones have been around for over a hundred years. Electret (condenser) microphones are a good choice because they are small and have a nearly flat response to sound. Being small an Electret plus it's electronics can be housed in a pea sized container. The task then is to mount this little can in a housing that keeps it dry, protects it from noise (like wind) and enhances the sensitivity to human voice over other sounds.
Easy in TheoryGetting a microphone to be sound-isolated from the house, waterproofed, and with an anti-wind muff is hard. The first attempt at a microphone was to just use an old web-cam mic but that died after 3 sunny days. An outside installation is much harsher than it looks.
Things That Did Not WorkTo preface: things that did not work for me. This is where the complexities of the practical problem overwhelm the simple solutions. You may have "better ideas" but I challenge you to prove them by building your own low noise mic (and I'll happily steal your better design).
NextOnce this part of the "sound infrastructure" is in place the linux server running Mycroft can listen. That done: what Dlexa and Pearl hear becomes (just?) a programming problem.