Had the same going on in my home town in Texas for several years. It would go on for hours then abruptly stop. There was no schedule to it, no regular pattern. Not everyone could hear it but it was very loud and disruptive for those of us that could.
Those who did hear the hum thought we were alone and going crazy until we started running into each other outside looking for the source of the hum. This might sound weird but it seemed like usually only one person per household was affected and nobody else in the household could hear it.
We started searching in small groups for the source of the hum but nobody ever found a definite source then after about 3 yeas of torture the hum ceased as suddenly as it began. Nobody has ever figured out where the hum came from or why only certain people could hear it even though it was extremely loud. In swamp and bayou country so no underground tunneling, no factories or large facilities, no 5G back then. It's still a mystery.
Those who did hear the hum thought we were alone and going crazy until we started running into each other outside looking for the source of the hum. This might sound weird but it seemed like usually only one person per household was affected and nobody else in the household could hear it.
We started searching in small groups for the source of the hum but nobody ever found a definite source then after about 3 yeas of torture the hum ceased as suddenly as it began. Nobody has ever figured out where the hum came from or why only certain people could hear it even though it was extremely loud. In swamp and bayou country so no underground tunneling, no factories or large facilities, no 5G back then. It's still a mystery.
As an American it's your responsibility to have your own strategic duck stockpile. You can't expect the government to do it for you.