Training and research for improving the sense of hearing

1 Better hearing, being able to hear low noise and or low speech.
-Playing audio books for example and decreasing the sound a little bit each time.
Update:Hearing something for a certain amount of time everyday, different audio, but
with the same sound hardness each time and putting the sound slightly
lower each week or month.

2 Being able to hear the direction of sound
2.5 Being able to hear the distance of sound

By Jeffrey Koelewijn from Holland