assuming shes average height. her boobs appear to be about 1/3 her torso and average torso of a female being 22.6” her boobs are about 7.5” long. a foot is 12 inches. theyre moving at 5,600ft aka 67200 inches a second. her boobs are flopping 8960 times a second.
8960 flops per second would result in the shockwaves from her breasts emitting an 8960 Hz tone, which is actually a very shrill noise within the range of human hearing. You can enter 8960 into this website to hear an audio sample of what her breast-tone would approximately sound like