hello

These sounds do occur and are very real, not to mention annoying. i am in the south of Spain, near Valencia. I am hearing them right now. It lasts for about 3 hours and i hear them approximately at monthly intervals more recently, and never heard them before, although i have only lived in this location for two years.

The noise is simple to describe but my phone does not record it well, The level of the "loudness" is drowned out somewhat when society wakes.

The sound occurs at what would appear to be a regular time ( which in itself is odd) or it is that with all the normal noises of a town it is drowned out. But seems tobe very audible between 05:00 -09:00.

Dogs seems to react to it also.

So the sound sounds like a solar wind might , a wind, constant it does not really vary. It seems to come from the sky.

The best way to describe it, is like a jet has flown over and you are hearing the "after jet noise" but for hours. Another similar sound is when you live next to a motorway/freeway and you can hear the road traffic noise .

it is loud enough to penetrate double glazing.

I live very close to the sea and there are mountains nearby. the sound is not being generated by any machine or human, it is way too vast, constant and consistent.

THOSE ARE THE FACTS