Hi, I am going to start off by saying I am a phd student in evolutionary biology, so my knowledge of acoustics and what not are minimal at this point. I am enrolled in an engineering noise control class this semester to fix that. I am trying to design an outdoor microphone array over several acres to simultaneously record sound levels of urban environments. I want to paint a picture of sound and how it changes throughout the day using noise maps. My collaborator and I are trying to build a prototype system (on the cheap) for this spring to show it works, then apply for a NSF to build a better system for next year. The problem is, I don't know where to start looking for the components online or what I need to build this. Any input would be greatly appreciated. Thanks ahead of time.