Some, aptly named drones, vibrate constantly against a rosin-coated wheel turned by a crank, producing a steady whine.

You've got two-foot-thick granite walls, and floors built to support industrial equipment of a century ago, which was extremely heavy and vibrated constantly.

Now the "Takhmaseeb" was vibrating constantly, as if it, too, were afraid.

Harroun also claimed that the mirror vibrated constantly due to the rough brick surface, rendering it largely useless.

Owing to our explanations constantly vibrating between the same points, an irksome repetition of words must occur; also the use of capital letters, genders, and technicalities peculiar to the science.

A floury film covers everything in the creaky, constantly vibrating building.

Unlike a typical lock, receptors are constantly vibrating and moving.

Here is an example of an advanced ringtone in the iMelody format, this is a silent ringtone that only makes the phone's vibrating motor vibrate constantly:

Another example of an advance ringtone, which makes the vibrating motor vibrate constantly, the backlight of the phone's display blink and plays a simple tone:

Her fear for Kit vibrated through her constantly now, and she couldn't be with him twenty-four hours a day.