The words of wise men are heard in quiet more than the cry of him that ruleth among fools.
The words of wise (men are) heard in quiet. So the Lord Jesus did "not cry, nor lift, up, nor cause His voice to be heard in the street" (Isaiah 42:2). Unlike the world's monarchs, who bluster when ought opposes their will. The "still small voice" of God is best heard in stillness and quiet. Compare Psalms 23:2, margin. If the poor believer is to "cry," let it be unto the Lord (Psalms 34:6), so shall he be delivered. Though generally the poor wise man is not heard (Ecclesiastes 9:16), yet 'the words of wise men, when heard in quiet (when calmly given heed to, as in Ecclesiastes 9:15), are more serviceable than,' etc.
More than the cry of him that ... Compare Naaman's bluster and his servants' words heard in quiet (2 Kings 5:11-13).
Ruleth among fools - as the "great king" (Ecclesiastes 9:14). Solomon reverts to 'the rulers to their own hurt' (Ecclesiastes 8:9).