I have a problem with my mind. Most of the times, songs stuck in my head & keep on repeating and doesn't get out of my head in any case. Sometimes, songs come in mind even when I haven't heard that song from a last ago. And usually, this happens when I sit under the fan. Noise of fan supports that voice in my mind. And when I switch off the fan & try to keep whole room silent, my mind also becomes silent completely, fully concentrated. Due to this matter, I haven't been able to concentrate even since starting of summers.