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Superposition of WavesThe principle of superposition may be applied to waves whenever two (or more) waves travelling through the same medium at the same time... The net displacement of the medium at any point in space or time, is simply the sum of the individual wave displacements. This is true of waves which are finite in length (wave pulses) or which are continuous sine waves.
If the swarm looks small it probably acts like a point source of sound.
From a distance it will act like a point source located at the COG of the swarm, apart from "self absorbtion" effects.
Of course, if the wind blows the sound towards you