Half a croissant, on a plate, with a sign in front of it saying '50c'
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binaural beats for whales and drivers

40 Hz binaural beats improve some kinds of cognition 10-20% So, tune large marine engines to have this sound instead of whatever they have now.
  [vote for,

Ship traffic noise has been described as harmful to the communication of marine mammals.

In humans binaural bets at 40 Hz improve cognition 10- 20% [link], so they could research a frequency that actually benefits cetaceans and then engineer marine engines to make those sounds instead. Smarter whales!

Also, cars have engine hum(noise). Perhaps if they tune engines to make 40Hz sound road attention would improve 10-20% resulting in fewer accidents. Volvo has tried a lot of safety things, perhaps this is for them. They could measure it.

beanangel, Feb 19 2018

40 Hz binaural beats improve cognition https://www.ncbi.nl...gov/pubmed/26612201
[beanangel, Feb 19 2018]

How a bell siphon works https://www.youtube...v=_vV_z_0lFQ8&vl=en
Explanation starts at 2:30 [MaxwellBuchanan, Feb 20 2018]

https://en.wikipedia.org/wiki/The_Hum [Ian Tindale, Feb 20 2018]


       [beany], that citation is from a journal called "Psychology Research", which means it's bollocks.   

       If they had any real data, it'd've been published in a neuroscience journal.
MaxwellBuchanan, Feb 19 2018

       The whole “binaural beats” phenomena does have some interesting properties, though, although I’m not sure it does anything much to attention other than to direct attention to the binaural beats phenomena itself.   

       For one thing, it consists of two tones, which are set to be a ‘beat frequency’ apart (ie 500Hz and 550Hz will give you a difference of 50Hz, which admittedly is a bad example as it would be easily confused with mains electricity, which is also 50Hz in normal countries). However, the two carrier frequencies are fed to the left and right ear separately – ie, the left might ‘hear’ 500Hz while the right ear ‘hears’ 550Hz. At this point, there’s no ‘beat’ difference going on –  they’re separate signals. That they’re fed into two separate ears on the same one person has the interesting effect that the beat frequency occurs wholly within the perception of the hearer, even though there was no real- world beat interference outside of what the ears heard (as they haven’t mixed yet (or at all) in the outside world).
Ian Tindale, Feb 19 2018

       That, [Ian], is interesting.   

       It also would make it very difficult to implement in a car - you would have to be wearing earphones or earbuds.
MaxwellBuchanan, Feb 19 2018

       Maybe the "mixing" still happens mechanically but within some anatomical structure, e.g. Jawbone.
EnochLives, Feb 19 2018

       Interesting. (+)   

       The "beat" would be produced by the overlapping negative spaces, like visual interference patterns but bi-auditory rather than binocular.   

       Which somehow reminds me of something completely different but bugs me and if I don't get it out this second it will be gone for good so...
...I'm gonna stick it here 'cause... well just because.

       Nobody seems to have figured out exactly how or why a bell syphon works yet. I read all of the theories and they don't have it right yet.   

       It's the 'water hammer' effect, where once something starts moving it doesn't want to stop moving. First law pure and simple.   

       Sorry 'bout that.
Ok, as you were.

       I've a vague recollection of reading where, in Vietnam, they tried out a sleeping aid, consisting of a 4hz difference between l/r signals in a headphone.
FlyingToaster, Feb 19 2018

       Now there’s an idea. Cosmic background beats. Or the Earth’s hum.
Ian Tindale, Feb 20 2018

       Does the 60 hz / 50 hz disparity account for the IQ difference between the States and everywhere else?
RayfordSteele, Feb 20 2018

       At first thoughts, yes – I’ve seen television productions originated in a 60Hz NTSC situation, and the results ranged from incomprehensible to inane. Compare that with some smooth 50Hz intelligent-sounding BBC nature or science output, and you’d think it were two entirely different planets. But then, looking further, some of the 60Hz output seems to show signs of wit and sophistication, such as Frazier, and, er, well, Frazier. Similarly, further exposure to the 50Hz output descends into dismay – things about people having their chattels siezed due to not enough money, competitions seemingly for people with no talent at all, and news programs for people who need reminding about how bad it is outside, what with Brexit and Trump and, well, pretty much nothing else every day. Overall, I’d say they’re fairly even.
Ian Tindale, Feb 21 2018

       You'd say anything if someone gave you a pound for a cup of tea. Or preferably, a fiver for four cans of Special Brew ...   

       // the Earth’s hum //   

       Five billion years and it still doesn't know the words ? That's just sad ....
8th of 7, Feb 21 2018

       The Earth is actually five billion and eleven years old. I know, because I've got a book saying it's five billion years old, and it was published in 2007.
MaxwellBuchanan, Feb 21 2018

       …or if you speak to a creationist, the Earth is two weeks old.
Ian Tindale, Feb 21 2018

       These would no doubt be the same people who sincerely believe that two wallabies* hopped all the way from Australia to the Middle East to get on a big wooden boat along with a large number of aggressive carnivores, including lions, tigers and polar bears.   

       *The "penguins" analogy has been debunked, as penguins could quite easily swim the trip without ever needing to get their feet dry, IT'S ALL THE SAME BLOODY OCEAN YOU STUPID HOMINIDS, WHAT'S SO DIFFICULT TO UNDERSTAND ? YOUR PLANET HAS ONE OCEAN ... JUST ONE ... AAARGH ...
8th of 7, Feb 21 2018

       <AI mechanized photons displace and emerge> Data point has emerged on subjects:8th of 7. Storing ... Recalculating logic constructs with emotion overlays....Time result for calculation undefined.... Changing to data acquisition waiting mode </AI mechanized photons displace and emerge>
wjt, Feb 21 2018


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