Смех прекратился, и возник слабый з

Смех прекратился, и возник слабый звук, настолько слабый, что был едва слышимым, но он становился громче до тех пор, пока они не могли различать его.

Results (English) 1:

The laughter stopped, and a faint sound is so weak that it was barely audible, but it became louder until they could not distinguish it.

Results (English) 2:

The laughter ceased, and there was a faint sound, so faint that was barely audible, but it grew louder as long as they could not distinguish it.

Results (English) 3:

the laughter stopped, and a weak sound so weak that was barely audible, but he grew louder until they could not see it.