With a deep thrum, a boulder the size of a basketball leaped out over the field.

This was a deep thrum that sounded through the whole ship, as if the ship itself were vibrating to the noise.

Lights moved, indicators rose, and then finally, the welcome sound of a deep thrum.

Instead, I found myself sliding quickly into sleep, lulled by the deep thrum of the train.

The murmuring of the crew rose above the sound of the wind and the deep thrum of the engines.

The string gave a deep thrum; the arrow flashed, rose a little, sank deeply into the soil inches from the beast.

With a deep thrum, the arrow sped upward.

The children from Carvahall played on and around her; laughing shrieks punctuated the deeper thrum of the adults' voices.

Somewhere in the distante, they could hear the steady, deep thrum of Federation transport engines.