susurrus

1. (literary) A whispering or rustling sound; a murmur.Examples: "[Johann Heinrich Pestalozzi was] pelted with buckets of water by firemen, and, finally, currycombed and rubbed down by two grooms, keeping a sharp susurrus between them, so as to soothe his wounded feelings; […]"; "The soft susurrus and sighs of the branches."; "They heard the Green Fork before they saw it, an endless susurrus, like the growl of some great beast."literary