The hollow echoes were due to being in the shower, no doubt.

The earlier arrivals had all convened with beer in the hangar office, away from those hollow echoes.

The Shadow's laugh brought hollow echoes from the walls of that abandoned abode.

They moved up the corridor, their footfalls against the bare boards sending out hollow echoes.

The steady roar of the surf beat up hollow echoes from the beach.

In that sound, he heard hollow echoes of his own doubts.

My boots scraped against the stone floor, filling the chamber with hollow echoes.

But we Aspects are shrunken, hollow echoes of our former selves.

Rain dripped into the water from trees, sending hollow echoes through the darkness.

His voice spawned hollow echoes in the room.