Friends:

Divine Hearing is gained by Establishing Awareness!

Once when the Venerable Anuruddha was dwelling at Savatthi in Jeta's Grove, in Anāthapindika's Park, a number of Bhikkhus went to the Venerable Anuruddha & exchanged polite greetings with him. Then they sat down & asked the Ven. Anuruddha:

Venerable Sir: 
What has the Venerable Anuruddha developed & cultivated so that  he has attained to his famous greatness of direct knowledge? It is, friends, because I have developed and cultivated these four Foundations of Awareness that I have won great direct knowledge.

What four? Here, friends, I dwell constantly contemplating upon:

The Body only as a formed group, neither as I, me, mine, nor a self...
The Feelings only as passing responses, neither as I, mine, nor self...
The Mind only as temporary mentalities, neither as I, nor any self...
All Phenomena only as constructed mental states not as any real...
while eager, clearly comprehending, & fully aware, thereby removing
all desire & frustration rooted in this world! It is, friends, because
I have developed & cultivated these Four Foundations of Awareness
that I have become empowered with suprahuman forces: With the
divine ear element, which is purified, refined, subtle and surpasses
the human, I hear both divine and human sounds, both those that are
far away as well as those that are near.

Source (edited extract):
The Grouped Sayings of the Buddha. Samyutta Nikaya. [V:304]
section 52: Anuruddha. Thread 13: The Divine Ear!

Details and references for further study:
http://What-Buddha-Said.net/drops/III/One_and_only_Way.htm
http://What-Buddha-Said.net/drops/III/Four_Foundations_of_Awareness.htm
http://What-Buddha-Said.net/library/DPPN/sa/saavatthi.htm
http://What-Buddha-Said.net/library/DPPN/j/jetavana.htm
http://What-Buddha-Said.net/drops/Sati_Studies.htm
http://What-Buddha-Said.net/library/DPPN/wtb/a/abhinna.htm

 The Divine Ear!