I don't know if it's just me, but has anyone else heard singing late at night? And I'm not talking about drunks from the pub singing, I'm talking as if it was a choir going up and down the road outside my house, singing contstantly, first it was faint, then it grew louder, then about 5 min later it faded away. At first I thought it was the wind, but I've never heard the wind do something like that again. But it has happened 2 more times over about 6 years. Anyone else heard something like that or know what it is? Natural or supernatural I just want an answer.