Should listening to music in study hall be allowed?

Should students be able to listen to MP3 Players on headphones during study hall?
Today you often don’t go anywhere without hearing music or at least seeing someone listening to music, music has become a part of our everyday lives. Students should not have to stop doing something they are comfortable with doing at home studying just because they are at school studying, especially when it is something so harmless like listening to music. Listening to music in headphones is not a distraction, it can help students study, as well as block out other distractions and surrounding sounds.
The main purpose of headphones is so that you can listen to your music without anyone else being able to hear it. Students are unable to hear your music when your headphones are in therefore not taking away from their studying. Your music does not distract others but also inhibits people from distracting you. If you are listening to music as you are supposed to, headphones should not be an issue. Therefore students should be allowed to listen to music in their study hall, as they do not present any immediate distractions to others. Ninety percent of students find that listening to music while working improves their focus and productivity. Music has also been shown to improve memory in students and helps students recall certain things as music gets the brain stimulated. Listening to music also helps the brain concentrate by engaging in a specific portion of the brain that is involved with paying attention. Listening to music while studying also helps the student focus by having a background noise that they are familiar with and will be able to be comfortable with. If music helps students concentrates and relax while studying then why would we take that away from them? When all other sounds are being blocked out because they are listening to music students can efficiently get their work done. With all other distractions and unfamiliar background noises blocked out from the student