The same way some fucked up people train themselves to ignore smoke detector chirps. I've known a couple of these people in my life. They managed to live with a chirping detector for weeks on end and when you bring it up they think you're making mountains out of molehills.
Because, in all likelyhood, they're not suffering at all.
People vary greatly in what causes them discomfort. I imagine the population that doesn't attend to chirping smoke detectors has a strong selection bias for not suffering due to it.
I don't mind carrying reasonably heavy things for miles on foot. I remember one weekend where I had some time to spare and needed to buy a chair, so I jogged about 3 miles to a strip mall, and carried the (boxed) chair back home.
Enough people negatively comment about the weight of laptops that I believe that it matters to some people, but I honestly won't care if my mbp weighed 2 or 3 times as much as it does. I can't understand how laptop weight bothers people without some medical condition, but I also believe them when they say that heavy laptops cause them discomfort.
In retrospect, growing up canoeing for a week every Summer on the Canadian border probably has something to do with it. By the time I was 16, for the longer portages, I'd be the one to take a lighter pack on my back and throw the canoe up on my shoulders. My dad and my brother would carry the heavier packs. Learning to tune out the discomfort of walking up to a bit over a mile over uneven ground through mosquito-infested woods with a 90 lb aluminum 3-man canoe on your shoulders plus a 20 to 30 lb pack probably causes both mental and physical changes that reduce your perception of discomfort from carrying things. There's also survivorship bias, where people inclined to feel discomfort carrying heaving things for distances are likely to not return year after year to canoe areas that require portaging.
Just because you're suffering doesn't mean all people in the same situation feel any discomfort.
0. http://knkx.org/post/mysterious-hum-keeping-west-seattle-nig...
This one started in Summer 2016 and is going 24-7. The only times I've stopped hearing it is when I've gone on vacation; I really need to move. But finding a new place in Seattle is kind of a nightmare right now, and moving to a new city is not without its own complications!
> The bulk of our observations from both stations do not support the hypothesis that the source of the Hum emanates from Zug Island
https://en.wikipedia.org/wiki/Zug_Island#Noise_and_vibration
> it served as an uninhabited Native American burial ground for thousands of years
The leading theories are it has something to do with this mordor like place https://en.wikipedia.org/wiki/Zug_Island
Noise and vibration[edit] In 2011, the Zug Island area was identified by Canadian scientists and Ontario's Ministry of Natural Resources as the source of mysterious rumblings and vibrations that have plagued hundreds of area residents with cyclical vibrations reportedly being felt in the ground up to fifty miles (eighty kilometres) away.[3][4][5]
The city of River Rouge reported in the Star that it cannot afford to spend any more money on investigating the hum. They claim the City Council had already spent over $1 million to help Windsor and Ontario find the source of the noise. However, they say it likely comes from the steel mill facilities on the island.[6]
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.[7]
Another report released on May 23, 2014, confirmed that Zug Island was the source of the hum.[8][9]
[3] Schmidt, Doug (September 21, 2011). "Zug Island likely culprit of Windsor hum". The Windsor Star. Postmedia Network Inc. [4] "Mysterious noise escalates in Windsor, Ontario". CBC News. January 30, 2012 [5] Ashifa Kassam (June 7, 2016). "The 'Windsor Hum': where is the noise plaguing a city of 210,000 coming from? | World news | The Guardian" [6] "River Rouge calls off search for Windsor Hum". CBC News. November 7, 2011 [7] Tingley, Kim (June 24, 2013). "The Sound and the Fury". OnEarth.org. NRDC [8] "Mysterious Windsor Hum traced to Zug Island, Mich". CBC News. May 23, 2014 [9] Colin Novak (May 23, 2014). "Summary of the ‘Windsor Hum Study’ Results"
Also, does the hum change pitch a lot? With multiple sources at different frequencies, there would likely be beat frequencies. Which could be in constant flux.