This is again a weird noise that’s hard to classify.

I would go for the hum phenomenon. What about you guys?

Loud “trumpet” sound recordered in Philadelphia, PA on March 14, 2012.

The video uploader’s┬ácomment says:

[quote_box_center]My camera phone is not very good on sound however im sure there were other people that recorded this sound,by the end of the video the sound had stopped. very weird.[/quote_box_center]

What do you think this electrifying noise is? Listen to some more on our map!

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  1. I searched this event, because I wondered if anyone else had ever heard it. It still baffles me from time to time, because I wonder why some others I asked didn’t hear it. It practically shook the sky, there was no way a person could sleep through it. This is coming from someone who has, slept through hurricanes, tornados, earthquakes and monsoons.