I want to make a cheap Infrasound gauge/meter/micro/sensor

I want to make an infrasound meter/monitor, decibel meter, etc, for personal curiosity, low budget. I am after large scale industrial emissions, and or vastly loud "events", passing large ships. Like a infrasound atmospheric seismograph.

Sooo.. I think it is something like .. an accelerometer.. maybe mounted to a Drum snare (a generically tight membrane presented as reference).. connected to a esp32 (I just happen to a bunch)

Or I maybe a section of PVC (or glass?) mounted in a quiet place with a single hole on one end, and a tight membrane inside... mount a accelerometer to that, or bounce a laser off it, or? Maybe placed in the large empty crawl space under my brick home?

Or a drop of mercury with a laser bounding off it at an angle with a long distance to spread as an "amplifier" or?

Does a vacuum help as a filter to lesser noise?

How can I pull this off inexpensively? It doesn't need to be small. (although suitcase size would be nice) - I also have a few locations available, so would be fun to network for source triangulation.

How does one test if it is working, establish the notion of baseline and gauge/volume level for the infrasound?

Sooo, a nice quick question! :-)