su·sur·ra·tion 
(s′sə-rāshən) also su·sur·rus (s-sûrəs, -sŭr-)
(s′sə-rāshən) also su·sur·rus (s-sûrəs, -sŭr-)n.
A soft, whispering or rustling sound; a murmur.
[Middle English susurracioun, from Late Latin susurrātiō, susurrātiōn-, from Latin susurrātus, past participle of susurrāre, to whisper, from susurrus, whisper, ultimately of imitative origin.]
su·surrant (s-sûrənt, -sŭr-), su·surrous (-sûrəs, -sŭr-) adj.