susurrus (n.)

1809, earlier as a medical Latin word in English, from Latin susurrus, literally "a humming, muttering, whispering" (see susurration).

Among the diseases of the ear, one of the most prevalent is the Paracusis imaginaria, to which both sexes are equally liable; and another variety of the same tribe, more frequent among female patients, called the Susurrus criticus, or Scandal-buzz. [The Lounger, Dec. 23, 1786]