It's the Cicadas!

@mashif If you hear a low frequency hum that might be the aliens landing. Look out your window. 😏

I’ve been at Chicago Symphony concerts at their summer home, Ravinia, where the Cicadas completely drowned out the Orchestra 

Mahler 123 . I live 10 minute from Ravinia. Yes once in a while you hear cicadas, birds and some insects. It does not bother me.Fortunate enough to appreciate the beauty of Ravinia. And Chicago botanical garden next to each other.One day Chicago Symphony orchestra were demonstrating a movie scoring on the screen. It’s really nice.

Yes, and they can steal your car keys and head to the casinos. 

Experienced them twice in Iowa (moved West when I was 22).

Shiny, loud, somewhat creepy and painful when one flies into the side of your head.

DeKay