susurration

plural susurrations

1. countableuncountableA low and indistinct whispering sound; a murmur.

   Halleck nodded, heard the faint sussuration^([sic]) and felt the air shift as a lockport swung open beside him.

   1965 October 1, Frank Herbert, “Book II: Muad’Dib”, in Dune, Philadelphia, Pa.: Chilton Book Company; [Toronto], Ont.: Thomas Nelson & Sons, →OCLC, page 255

   3 more examples

   Most of the Hummers are honey-lovers, and they extract the sweetest juices of the flowers. The "soft susurrations" of their wings, as they poise above the flowers, inserting their long beaks into tubes of nectar, announce their presence.

   1898, Birds and All Nature, volume 4

   The rain was now falling more steadily, with a low, monotonous susurration, interrupted at long intervals by the sudden slashing of the boughs of the trees as the wind rose and failed.

   1907, Ambrose Bierce, Beyond the Wall

   "If only that last part is a translation…." said Dalton hopefully. Then the alien susurration ceased coming from the reproducer and he closed his mouth abruptly and leaned forward.

   1954, Robert Abernathy, The Record of Currupira