How to expand range of hearing frequency

Is there a way to increase my min and max frequency for sound? also how to make me more sensitive to lower decibel sounds. I mean in a permanent way of training myself. No hearing aids or earphones hahaha. I've had this sudden inspiration to tune and expand my senses after i recently took my hearing test and realized my max frequency range was about 10% higher than the normal range of hearing. is this is proven not to be possible list sources, i have an open, but critical mind.

I offer you an ear training quiz:
http://www.easyeartraining.com/Quiz/1-In…
http://www.easyeartraining.com/Quiz/2-Dr…
http://www.easyeartraining.com/Quiz/3-Pe…
http://www.easyeartraining.com/2010/07/1…
That can really help you.

Cheers ebs

I think of you do have that ability you were probably born with it,you can train your self to locate the source of sound and probable to be able to hear lower decibel sounds by focus exercises,but i don't think you can expand your hearing frequency range.