Addendum: after a bit more research, I've come to the conclusion that an instrument like the "Raspberry Boom" which is detecting only sound below 40 Hz, is good for sensing events that move large volumes of air: meteors, volcanic eruptions, large-scale explosions, ocean surf, and of course wind. It should pick up things that go "whoosh" or "boom" better than your ear does, and from longer distances. However it detects much less than your ear does of smaller things that go "crack" or "bang", for example small fireworks, handguns, popping balloons, etc; those events show up mostly in the 200 Hz to 2 kHz range, and also higher frequencies when they are closer.