He heard Michael's sigh at the other end of the line.

Jack could hear a sigh on the other end of the line.

She heard a sigh from somebody, but they didn't argue the point.

He can hear a gentle sigh from the back of the small building.

I heard a heavy sigh rising up from the ground.

And I heard a small sigh of relief from my sister.

He heard a sigh, as if they had been waiting to see something huge, and before them was only an ordinary being.

The maid heard a sigh on the other side of the door.

Then I'll hear a sigh and the person hangs up.

He heard her long sigh, like an explosion of relief.