Is there some technique to surpass noises when meditating? I'm having a lot of troubles with noises. I try to close my ears with cotton, but it does not works great.
Is a little bit difficult to me try to meditate rounded by noises (here, where a live, people seems to be sensible to noise, and worst, they like to put their automotive stereo system at high decibels despite the fact that it is forbidden by law (here the State does not get to apply its own laws), its like some kind "meat show").
So, is there some technique to surpass noises when meditating?
Noises are going to be a problem if you are just starting out.  This is especially so if they are the abrupt, jarring type of sounds that you seem to be contending with.  I would highly recommend that you do your best to find a quiet place to sit at first - even if this means leaving your home and sitting somewhere else.  You might be surprised to find that many of the more liberal Christian denominations and the Unitarians might offer you some space in their respective sanctuaries to practice.  The same goes for campus chapels.  My own sangha has used everything from a classroom in a Methodist Sunday school to a yoga studio!

If you must sit in a noisy area, my best advice is to treat sound just as you would any other distraction or phenomenon you might encounter on the cushion.  This is going to vary depending on your tradition, but coming from the samatha school that I practice, I'd advise you to double down on your meditation object.  If you are following the breath, continue to watch the whole body of your breathing as closely as you can.  Be with it for its entire duration.  Watch the blankness in the space between your exhalation and inhalation.  Sound is a difficult obstacle to work with, but like pain, agitation, sensual desire, or really any of the five hindrances, it won't be able to gain a foothold in a mind that is closely applied to its object.    

Also, for the love of Pete, don't spend your time on your cushion fantasizing about how much better your meditation would be if only it were quieter!  That'll kill your concentration faster than the sound of a truck driving through a nitroglycerin plant!