Not sure about the low frequency but would assume some rap music or bass
competition cds would work. Craigslist should easily find you a nice car or
Suv already setup with several subs and amps.

In all seriousness I can not imagine the very loud low frequency would not
also severely disturb the hives as well for such long periods.

Here are some comparisons related to decibles
http://www.industrialnoisecontrol.com/comparative-noise-examples.htm

And then of course there is always the good ole "Brown note or noise" , not
too good on a hot summer day miles away from home in a bee suit...
https://en.m.wikipedia.org/wiki/Brown_note

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