Apart from a BBC interview on July 20th, I’m going off the grid for a few weeks in central Canada. When I get back and begin sorting through dozens of emails, it would be great if somebody will have sourced out for me two, highly sensitive low frequency/infrasound microphones to do beamforming with my Zoom H4n Pro recorder. I know less about this side of the research, but I am rapidly learning and need technical advice.
For those of you who know this field well, would this be a cheap option? http://volcanomodels.sr.unh.edu/jbj/MICROPHONES/J1%20Basic.pdf