Until, that is, the calm was disturbed by the loud drone of the vacuum cleaner.

The sound grew from a hum to a loud drone that rolled across the river and cau windows to vibrate in Roma.

Pilar felt trapped by the loud drone of the engines, steadily pushing them upstream.

Lately in my town, we have gotten very used to hearing the loud drone of chain saws as a number of aging and ailing trees are taken down.

That loud, lazy drone I'd found so drowsily atmospheric was the result of a cicada family reunion.

A loud drone rose in the enclosed space, and Vaughn recognized the sound of the structural-integrity field straining to protect the shuttle.

A loud drone of feedback sent the birds into a tizzy - in one frightened swoop they ascended to nearby branches - as the five performers followed suit, each leaning on the trunk of a tree.

The chief turned to his men and shouted so he could be heard above the buzz that had now become a loud drone.

Two large generators powering the "Meet Joe Black" set, they say, filled the neighborhood with diesel fumes and an annoying loud drone.

While there is a loud drone of voices this week at the Wall as the names are read, normally there is only quiet here.