'Ears' in the Bible

So Eli said to Samuel, Go back: and if the voice comes again, let your answer be, Say on, Lord; for the ears of your servant are open. So Samuel went back to his bed.

Then the Lord came and said as before, Samuel, Samuel. Then Samuel made answer, Say on, Lord; for the ears of your servant are open.

And the Lord said to Samuel, See, I will do a thing in Israel at which the ears of everyone hearing of it will be burning.

And Samuel said, What then is this sound of the crying of sheep and the noise of oxen which comes to my ears?