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A comment on There's a Persistent Hum in Windsor, Ontario, and No One Knows Why. Parent comment

Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by kawfey on Tuesday February 20, 2018 @05:53PM (#16425029)
With laughable accuracy: http://fox61.com/2013/05/22/fox-ct-investigation-is-costly-g...

Part of the problem is multipath due to reflections caused by buildings, hills, trees, etc. Anytime you listen to thunder or fireworks the rumble persists due to reflections off of such things. It's incredibly difficult to algorithmically remove multipath from terrestrial sources.

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Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by eeZah7Ux on Tuesday February 20, 2018 @07:57PM (#16425866)
Correct. At 30 Hz directionality is a pipe dream.
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Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by vl on Tuesday February 20, 2018 @08:39PM (#16426109)
It's relatively trivial to find direction of the 30 Hz sound source, given 1 million budget - you just need to place microphones 11 meters apart and raise them above buildings until you get direct line of sight to the main source.
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Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by ta2987 on Wednesday February 21, 2018 @12:06AM (#16426996)
A million bucks wouldn't get a square city block of what you describe.
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Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by Dylan16807 on Thursday February 22, 2018 @01:54PM (#16440240)
A square block? 5-10 microphones is plenty. Your goal is to find a direction from the place you deploy, not to blanket the city. Then you can redeploy somewhere else to get another direction, etc.
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Re:There's a Persistent Hum in Windsor, Ontario, and No One ... by eeZah7Ux on Sunday February 25, 2018 @10:53AM (#16459474)
That's an example of how poor directonality is at 30 Hz.
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