I don't think there's any scientific basis for the use of hail cannons (by any name). The explanation that the sound waves "disrupt the formation of hailstones"

I don't think there's any scientific basis for the use of hail cannons (by any name). The explanation that the sound waves "disrupt the formation of hailstones" is a post-hoc justification; the practice had existed for hundreds of years, long before anyone had any theories about how it might work.