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.
He was irritated by the sound.
That sounds good to me.
This sounds very interesting.
Can't you hear the sound?
Not a sound was heard.
That sounds interesting.
Nature endowed her with both a sound mind and a sound body.