This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A whispering or rustling sound; a murmur.

n. The act of whispering; a whisper; a murmur.

n. A soft murmuring or humming sound; a whisper; a murmur.

n. the indistinct sound of people whispering

"But the words go out to the open space ahead of her, where pop music drifting from hidden speakers meets the susurrus from the fountain below, so she can’t tell if he heard."

sound   

susurrant    insusurration    susurration    susurrous    susurrate   

whisper    murmur   

earth-shaking    giant    boondock    susurration    Avon    whoosh    whish    sibilance    sibilation    plop