Mussitation

n.

1.

A speaking in a low tone; mumbling.

Noun

1.

mussitation - a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech Synonyms: murmur, murmuration, murmuring, mutter, muttering

maunder, mumble, murmur, murmuration, murmuring, mussitate, mutter, muttering, sound