I heard something fall to the ground
The sound became fainter and fainter, till at last it disappeared
The explosion frightened the villagers
A strange sound was heard from behind the door
Nowadays, however, calculators can be used freely in school examinations, and already in many schools the only sound to be heard during a math exam is the sound of children tapping on their calculators
My watchdog is alert to the slightest sound and movement
Turn up the radio. I can't hear it
Would you turn down the stereo a little
He was irritated by the sound
That's right, that strange sound was the final death scream of the cooling fan
