If you are getting a lot of complaints from your neighbors about all the noise you make, you may be listening to music at high volume. Actually, there may be many factors that contribute to your loudness, but instead of changing your lifestyle it is easier to sound proof your apartment and enjoy playing loud music and having friends over, without bothering anyone. What choices you have when it comes to stopping noise?
The best thing you can do is to get a quality foam, and not just any foam, it has to be an acoustic foam. You can find it on the Internet and have it delivered to your place within the same week. You don't have to use the foam recording studios use, because it is a more expensive solution that you may not need at all. Just make sure you are getting a thicker acoustic foam and you will be able to block the noise that is coming out of your apartment. Make sure to calculate how much material you need, where you will have to make the cuts and how will you install all this - by hiring a contractor or do everything by yourself.