Source : Webster's Revised Unabridged Dictionary (1913)

Murmurous \Mur"mur*ous\, a. [Cf. L. murmuriosus, OF. murmuros.]
   Attended with murmurs; exciting murmurs or complaint;
   murmuring. [Archaic or Poetic]

         The lime, a summer home of murmurous wings. --Tennyson.

Source : WordNet®

murmurous
     adj : characterized by soft sounds; "a murmurous brook"; "a
           soughing wind in the pines"; "a slow sad susurrous
           rustle like the wind fingering the pines"- R.P.Warren
           [syn: {rustling}, {soughing}, {susurrous}]