This argument is bogus unless you establish the frame of reference.
God does not need a book called the bible to learn how God is supposed to be. God established the written word "logos" for mankind alone, and not for the stars, or the moon or the planets, or the cows, or horseflies, or "ROCKs that fall because they have no free will", they all "hear" God's word for them in the manner God established for them to "hear" it.
God gave man six senses.
Eyes, Ears, Nose, Mouth, Skin and spirit so that man can see, hear speak, smell, feel, and sense the presence of all that is around him. We call that "human awareness".
It is with our awareness that we "hear" the voice of God in whatever form it comes to us. From these senses we establish within our spirit (soul, if you like) the God word, that we live our lives by. That is another meaning for "hear", for now we have knowledge of God within us, through our perception senses, which we apply to our lives. Therefore we are known by that which we "hear" and apply of the word of God in our lives. The Holy Spirit interacts with man through man's spirit, and confirms the truthes we receive through our other senses.
Yes Man has the ability to hear the word of God, God gave it to man in the creation. It is not something that must be "activated" through "regeneration" it is already inherent in man. Regeneration implies using the same stuff, but unclogging it so that it works the way God intended. God alone knows our inner workings, and God alone does the regeneration. He does not regenerate the unwilling!