Truth: There is no scientific research that supports this.
You will find them on the market, CDs with classical music designed to be played for developing babies while their in the fetal stage because parents have been lead to believe that playing classical music for their baby will help with cognitive development. It has also been said that listening to relaxing music while you study helps you focus. That all depends on the individual. Some people can study in a noisy environment and still stay focused while others need complete silence to stay on task.