I'm approaching my thesis in meteorology (2 final exams to go) and while I originally intended to write simple 1-column prediction model in FORTRAN, I'm considering also including calculation for low frequency acoustic waves.
I won't invent new boundary-layer column model but extend current to calculate propagation of < 12 Hz acoustic waves
Does anyone have any experience with equipment needed for monitoring infrasounds?
Is building microbarograph good choice?
I'm approaching my thesis in meteorology (2 final exams to go) and while I originally intended to write simple 1-column prediction model in FORTRAN, I'm considering also including calculation for low frequency acoustic waves.
I won't invent new boundary-layer column model but extend current to calculate propagation of < 12 Hz acoustic waves
Does anyone have any experience with equipment needed for monitoring infrasounds?
Is building microbarograph good choice?
A large-diaphram RF condenser microphone with tight seal would probably work splendidly here.
With that, and using some correction in frequency response, you can get down to milliHz.
I found DIY circuit board (http://www.beis.de/Elektronik/HF-Mic/HF-Mic.html), where diaphragm was made with chocolate foil and supposedly test went well compared to small diaphragm capsule (Sennheiser MKH 415)
Then I found this (http://online.physics.uiuc.edu/courses/phys403/303Project/Fall2003/DetectionOfAtmosphericInfrasound_by_ChrisOrban_2003Fall.pdf), which includes good explanations, simple diaphragm circuit for low freq. and inexpensive A/D converter (http://www.seismicnet.com/serialamp.html)
Although I'm wondering how to make the diaphragm if I decide to try it, I guess that's it
Thanks for pointing to right direction