He hears music sometimes in school without wanting to; is that a sin?
Question

                I have previously stopped listening to music, by me not putting it on, but I hear it at school and other places, where I try not to enjoy it but sometimes I do?

Would that count as listening, and would I be accounted for it or not?
Praise be to Allah. 
          There is a difference between the one who listens to 
          music and the one who hears it. The one who listens to songs hears them 
          deliberately, wants to hear them and enjoys that, whereas the one who 
          only hears the sound that reaches him, without wanting or intending 
          to do so, such as when riding in an airplane or a bus in which there 
          is music, or who goes to the marketplace and hears that from some stores 
          without wanting or intending to listen to it. There is a difference 
          between the latter and the one who sits down to listen to and enjoy 
          this haraam thing. 
 
          Hence Shaykh al-Islam (Ibn Taymiyah) said: The command and the prohibition 
          have to do with listening. Merely hearing something is like seeing; 
          it has to do with the intention behind seeing, not what happens without 
          a person choosing it…. The same applies to committing sin through the 
          five senses of hearing, sight, smell, taste and touch; the commands 
          and prohibitions are connected to what a person intends and does, but 
          whatever happens without him choosing it, there is no command or prohibition 
          with regard to that.
 
          (Majmoo’ al-Fataawa, part 5, p. 566) 
 
          One has to denounce that evil as much as possible, but 
          if he cannot do that, then he should denounce it in his heart. One of 
          the things implied by denouncing it in one’s heart is not remaining 
          in a gathering or a place where that evil is happening, if one is able 
          to leave. 
 
          With regard to listening to it, one must strive against 
          that as much as possible and seek refuge with Allaah from the Shaytaan, 
          and remember Allaah. Then Allaah will take that away from you. If that 
          makes your heart attracted to it, then you should keep away from those 
          parts of the school. If it will not cause you a lot of trouble to miss 
          some of those classes in which these things happen then you should not 
          attend them. You have to remember that Allaah is always watching and 
          fear Him, for whoever fears Allaah, Allaah will give him a way out. 
          Allaah says (interpretation of the meaning): 
 
          “And whosoever fears Allaah and keeps his duty to 
          Him, He will make a way for him to get out (from every difficulty)”
 
          [al-Talaaq 65:2]
 
          And Allaah is the Source of strength.