At least a some researchers believe that Bees use sound especially during swarming to aid in their flight? Could this be possible? One online think tank believes it is and it has been debated and reasoned that the bees are perhaps much more highly evolved than we ever thought possible.
Now then all these swarming insects seem to have something else in common. A double set of wings. One set could be bouncing sound waves or is able to cause a rippling affect on the other to further enhance the sound waves. Like an acoustic transducer on a taunt film, for an insect to do this considering there cellophane type wing structure would not surprise me much although it is one of the coolest things going in nature you have to admit. Vibrational energy use seems to be a standard feature in nearly all complex life on Earth to some degree. It stands to reason that it would find a way into the aerodynamics of swarming insects.
If you ever watch a group of hornets manicure a little symmetrical flowered bush it is truly amazing the accuracy and precision they use in tasking and the sound they make could be the reason that they work in teams as they get an additional cooperative advantage in doing so, as you suspect the Locusts do in their swarms. You have me believing in it too.
Now then hornets are heavy little buggers considering their plump body and they have extremely powerful flying capabilities and the maneuverability, agility and stability is impressive indeed. Perhaps they are more adapted. And look at the Bumble bee too which I do not know but assume it does not swarm but it buzzes as it flies. Does it get an enhancement from the buzzing? If you have ever listened to an insect fly by your ear many of them buzz, do they all use the same abilities a little, but in a swarm they turn it up a notch and we get a piling affect like a giant amplifier and speaker? One think tanker stated;