Murmurous (adjective)

Making or characterized by a low continuous sound.

Origin:

Late 16th century: from latin murmurus "murmuring", from murmure "a murmur".

Examples:

1. The river flowed with a murmurous rush.
2. The murmurous sound of the waterfall was soothing to the ear.
3. The audience was hushed by the murmurous sounds of the choir.
4. The murmurous voices in the room made it difficult to concentrate.
5. The murmurous sound of the wind through the trees was heard in the distance.