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There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

nytimes.com

251–260 of 304 posts

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#253

Earlier quoted context omitted.

This might be a case of https://www.reddit.com/r/earrumblersassemble/

That page right there is why I never used Reddit and when I drop by I just don't understand it. So, your comment sounds interesting, I click the page and it's just a bunch of unrelated stuff with title's like "Does anybody else use it when they don't want to hear something ?" Hear what? What is the level above, what connects these posts?? The top of the page just says "Come for the cats stay for the something" and th…

Under the subscribe button there is always a small description of the subreddit. Here, it says:

>A subreddit for those who can control their Tensor Tympani muscle. http://en.wikipedia.org/wiki/Tensor_tympani_muscle#Voluntary...

I think it's pretty self-explanatory.

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#254

Three people so far have suggested in the comments here it should be "easy" to triangulate it. Note that according to Zug Island's Wikipedia page, "As of April 2013, a Canadian scientist is using sound-level meters and a portable "pentangular array" of cameras and microphones to try to precisely identify the source of the sound, in order to know whom exactly to ask to fix it" and that "the City Council had already sp…

At that point the city should just organize a contest and give 1 million to whoever finds it. For that much money I'm convinced someone will.

[deleted]

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#256
post #138

Earlier quoted context omitted.

I'd guess amplitude is massively affected by microphone sensitivity. This is not easy to measure and might depend on the direction. Consider: * The amount of walls between a mic and the outside. * The absorbance/reflection of nearby materials, including their shape (flat surface will reflect sounds amplifying certain directions). * The clutter between the source and receiver. Sound carries over water, not over cities…

It does require synchronization of the recordings, which might also be difficult. Could you record with a multiple "microphone connected to a Raspberry Pi" setup, with the time synchronized using something like the NIST time signal[1] using an RTL-SDR, or a cellular signal, or GPS, or maybe using NTP? [1]: https://www.nist.gov/pml/time-and-frequency-division/nist-ra...

Yes, that seems like the best approach. At 20Hz waves, ntp would probably be good enough. The real issue I can see is to get that time-data into the sound data. Maybe you could time-stamp the beginning of a recording, and start a new recording every minute (to compensate clock drift). That might work, biggest issue I see is potential variable latency between 'starting a recording' and the actual first recording happening.

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#257

I take prescription stimulants for APD, audio processing disorder; whatever that actually is.. For me, I have difficulty hearing people talk and focusing when exposed to multiple or dynamic background noises.. Basically it's a failure of autonomous filtering or prioritizing of sounds. I was on Belle Isle last year, two times, which is a few hundred meters from Windsor, and the sound was extremely soothing for whateve…

Were there any ships around? Last year I had vacation in Malta and I could barely sleep due to constant, low, barely noticeable noise. I have attributed it to the ship engines, as there were many of them around and couldn't find better explanation (tried to turn off every appliance and sleep in different room with no avail).

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#258

Earlier quoted context omitted.

Meaning it's just a rendition of a hum, not an actual recording of "the hum".

> Meaning it's just a rendition of a hum, not an actual recording of "the hum". ...what? Did you not open the link at all? Or are you suggesting they're lying? They literally explicitly say it's an actual recording of the Windsor Hum at 11:12pm on August 24, 2011...

I'm not suggesting anything; I'm interpreting the grandparent's comment.

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#259

We can put Hamburg (Germany) on the list of "humming cities" too. When I moved close to the harbour I started hearing a humming sound, espececially at night, almost exclusively indoors. None of my flatmates heard that sound, so I started questioning my perception until I found another person living in the same building hearing that sound. Our bedrooms are located one below the other and the sound is most perceivable…

Is a hum not more or less expected in the vicinity of busy harbors, even more so than in general industrial areas? Harbors attract a lot of possible sources that could cause a hum: maritime equipment, ship engines, generators, industrial equipment, large refrigerators (in containers or in warehouses), ...

You may want to read about the Kokomo, IN "hum" investigation which was traced back to an industrial source [1].

[1] http://www.le-bruit.com/easy-media/kokomo_hum_report.pdf

Re: There's a Persistent Hum in Windsor, Ontario, and No One Knows Why

#260
post #27

Sigh. I've coded too much this week. My brain just immediately went to: comment out half the city at a time and binary search the source. Guess you can't really do that. I wonder if the hum persists during a power outage.

Replace "comment out" by "turn off the electricity for" and maybe we can binary search it.

But might have to turn off electricity for days if generators are used.
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