'Voices' in the Bible

Then it happened on the seventh day that the child died. David’s servants were afraid to tell him that the child was dead, for they said, “While the child was still alive, we spoke to him and he would not listen to our voices. How then can we tell him the child is dead, since he might harm himself [or us]?”

And when he finished speaking, the king’s sons came, and they raised their voices and wept; and the king and all his servants also wept very bitterly.

I am this day eighty years old. Can I [be useful to advise you to] discern between good and bad? Can your servant taste what I eat or drink? Can I still hear the voices of singing men and women? Why then should your servant be an added burden to my lord the king?