Does rain have a characteristic infrasound signature?

[sheeny]

I was motivated to do this after I fooled my self into mis-identifying the lightning strikes in this thread after installing the 20s mechanical filter on my RS&B:

Unidentified Boom detected near Oberon, NSW, Australia

Well, this is sort of embarrassing. After a lot of research, it turns out this is just lightning. It turns out, this is the first time I’ve detected lightning since I changed the mechanical filter on the Boom from 1s (1Hz) to 20s. With the 1s filter each lightning strike is quite distinct. With the 20s filter it appears there may be low frequency infrasound generated from both pre- and post-strike charge movement. i.e. the infrasound begins to build before the sound of the lightning strike arri…