III. ORGANIC MATTER
2. Sensation; special sensation; sound; sound in general
[Verbs] whisper, breathe, murmur, purl, hum, gurgle, ripple, babble, flow; tinkle; mutter (speak imperfectly) [more]; susurrate.
steal on the ear; melt in the air, float on the air.
[Adjectives] inaudible; scarcely audible, just audible; low, dull; stifled, muffled; hoarse, husky; gentle, soft, faint; floating; purling, flowing; whispered; liquid; soothing; dulcet (melodious) [more]; susurrant, susurrous.