Question: Oh Virtuous Shaikh, some youth, when they are sleeping, place a stereo near their head and busy themselves with Quran. So what is the validity of this?
Shaikh: Why do they place the stereo?
Questioner: For example, he cannot sleep except when he hears the Quran?
Shaikh: There is no harm in this.
[Taken from: http://shamela.ws/browse.php/book-7687/page-2426 ]
Faisal ibn Abdul Qaadir ibn Hassan