Synonyms for Rustling (same or very similar meaning)
WordNet sense 1 (the light noise like the noise of silk clothing or leaves blowing in the wind):
rustle, whisper, whisperingWordNet sense 2 (characterized by soft sounds):
murmurous, soughing, susurrousWordNet sense 3 ((of sound) relatively low in volume):
softFrom the ODE community, based on WordNetadd/edit