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Very interesting. I can remember being able to hear a high pitched tone when I was 4-6 shopping with my mother in department stores that seemed to get louder wh
by skmurphy 2y ago
Very interesting. I can remember being able to hear a high pitched tone when I was 4-6 shopping with my mother in department stores that seemed to get louder when we approached flush mounted speakers in the ceiling. This article measures the frequencies and explains it's a normally operating feature of the systems.
- raverbashing 2y agoI'm not sure I ever managed to hear a 19kHz tone, but I'd say it might have been possible (or the tone was a lower frequency one). But yes the old CRT whine I could definitely hear
- skmurphy 2y agoI was young. My mother could not hear it and thought I was just being annoying. This is several decades ago, now I can barely hear my turn signal blinker and am preparing to emulate my father's practice of driving a few miles with his blinker on after signalling a lane change.
- metabagel 2y agoOne thing that can help is pressing the turn signal lever with less force than is needed to latch it. This should cause the indicator to flash three times and then stop. It’s an operating mode I wasn’t aware of for decades.
- joecool1029 2y agoNot all cars do this, german car feature? (only VW's I've driven from 2000's onward seemed to have)
- lsaferite 2y agoMy Kia has it as well.
- wlesieutre 2y agoMazda too
- DANmode 2y agoIn those cases, you just hold the signal to the point of switch activation, then let go when done.
- vel0city 2y agoI've had this feature in Chrysler, Ford, Honda, and Hyundai cars ranging in year from 1995 to 2021.
- martin_a 2y agoI think "comfort turn signal" is a feature all newer (2000+) cars should have. I haven't found one from that age that didn't have this feature.
- joecool1029 2y ago2002 Mazda Miata and 2002 Toyota Camry XLE don't have this. I couldn't find anything about it being a regulation, seems to have become common toward end of that decade though.
- organsnyder 2y agoWorks on my 2009 Honda and 2017 Chrysler.
- aaronmdjones 2y agoMy 2012 Vauxhall Astra does this.
- aaronmdjones 2y agoIt's been too long since I posted to edit this, so I'll reply to my own comment: something else my car does that isn't at all unique and some people might be delighted to learn (if theirs supports it too), is that if you hold down the unlock button on the keyfob (rather than press it), it lowers all of the electric windows, and if you hold down the lock button, it raises them. Useful if you left one of your windows open and it starts raining; you don't need to go to the car to shut the windows.
- joecool1029 2y agoAnother German car feature. There's some regulation in the US that requires them to be coded not to go back up (but you can change the coding with a cable). Family has an X5 that will go down as you describe but not up for those reasons.
- treflop 2y agoLong ago I made a conscious effort to turn off my blinker when I’m halfway into the next lane and now turn signals are like entirely subconscious for me.
- CamperBob2 2y agoI've been trying to break that particular habit, on the grounds that most of the purpose behind a turn signal is to indicate entry into a new lane rather than departure from the old one. Not sure what the law says about that, though.
- DANmode 2y agoBoth equally important. If the signal is used sufficiently in advance (aka "indicating" your lane departure), and you're not cutting things so close you need a blinker to fend off cars behind, then there should be no problem turning it off once half of your vehicle is in the lane.
- jimmaswell 2y agoI'm 30 with mild tinnitus and listen to music too loud but I can still hear CRT whine too, go figure.
- gocartStatue 2y agoWait, people regularly just don’t hear it?
- LorenPechtel 2y agoMost of us don't. The signal is at a frequency of one cycle per line-second, but there's an idle period while the beam goes back up to the top where it still cycles so the actual frequency will be a bit higher than a simple lines/frame * frames/sec calculation would indicate. Even for broadcast TV that was beyond what a lot of adults can hear (but a lot of kids can, as plenty of posters in this thread have said.) I want to say 15.7khz but I certainly won't swear to that. As your resolution goes up the frequency will go up so some people would be able to hear what resolution a monitor is set to.
- Nition 2y agoYou'll usually stop hearing the CRT whine in your 20s, 30s if you're lucky. It's at nearly 16KHz and the highest frequency you can hear always drops as you age. Of course, these days people also regularly don't hear it since CRTs are nearly all gone.
- ikari_pl 2y ago37 here. Definitely still hear if the CRT is on. I have a few 8bits.
- antod 2y agoEven back in my youth and early adulthood, there was a wide variation on how loud CRTs were between models and individual units. There were some that were close to silent for me, while others were very noticeable.
- Nition 2y agoYeah, that one's a bit lower. 15.625kHz or 15.75kHz depending on your region.
- imabotbeep2937 2y agoI've been tested to 22+kHz, autistic, and older. It was the worst era. Some of the awful roars of noise I've heard while older people called me a weirdo. CRTs, early checkout scanners, some audio systems. And back when "as seen on TV" electronic dog whistle trainers were all the rage? Torture.
- LoganDark 2y agoA few years ago I went to the beach. The place I was staying at had a CRT television. I tried to use it once. I have no idea if something was wrong with it, but it was loud enough to cause pain. Once I turned it off, everything was quiet again and the pain was gone.
- mateus1 2y agoI wonder how much of this sound pollution disproportionately affects autistic people. We need to make our soundscapes accessible.
- korhojoa 2y agoNow if the same could be done for bad LED lighting. I hate being somewhere where the whole room is strobing at 100 hz.
- benpanter 2y agoYeup. Interesting how the older LED bulbs are particularly bad for this (and in the UK, at 50Hz). More modern high quality ones seem significantly better.
- aaronmdjones 2y agoGP's comment said 100Hz because that's what you get from full-wave rectification of 50Hz mains, so they were talking about that. It'd be 120Hz in countries that use 60Hz mains (e.g. in North America).
- slimsag 2y agoOr the idea that the humans are just blissfully unaware while their 'hyper' cat/dog is stuck inside a home with some device screaming 24/7, LED lights flashing, etc.
- lifeisstillgood 2y agoThat’s … a horrible thought. How does one get a 19khz microphone to check I guess?
- Aachen 2y agoMy phone shows plausible-looking data up until 24 kHz. I don't have a test device to see if it finds the tone, though Edit: https://play.google.com/store/apps/details?id=org.intoorbit.spectrum https://play.google.com/store/apps/details?id=org.intoorbit.... this is the app I use most. Phyphox (https://f-droid.org/en/packages/de.rwth_aachen.phyphox/ https://f-droid.org/en/packages/de.rwth_aachen.phyphox/) seems to only go until 6 kHz but has a lot of other tools. For those wanting to avoid GPlay, this F-Droid app seems to go slightly above 20 kHz but I don't like the interface as much as spectroid: https://f-droid.org/en/packages/org.woheller69.audio_analyzer_for_android https://f-droid.org/en/packages/org.woheller69.audio_analyze...
- bradknowles 2y agoGoing into Sears used to drive me nuts. My parents finally accepted that I was actually hearing something that they couldn’t, but it took a while. I don’t know if it was the loss prevention system that was doing it, or what. All I could do was localize it down to being anywhere remotely close to the entrances. And the closer you got, the louder it got. These days, my tinnitus is constantly ringing at about that same frequency. So, I would probably never be able to hear it again.
- RF_Savage 2y agoCould have been the pulse frequency of old magnetostriction loss prevention rfid tags. The tone is not meant to be audio, but might be inadvertently emitted by the electronics.
- zachrip 2y agoI wear hearing aids and could always hear them as I passed near them. Obviously not the same as real sound as it was just interfering or something.
- noefingway 2y agoExactly this. When I was 17 I worked at a JC Penny store as a stock boy. Every time I approached certain entrances (like the main one that opened into the shopping mall) and other areas of the store my ears were assaulted with a high pitch squeal. Never figured out what it was, nobody else seemed to hear it. I've always had tinnitus, and the frequency always seemed to be the same. In fact, I'm listening to it now.
- Moru 2y agoHave seen a few stores and public places installing speakers pushing out a high pitch tone to irritate youth so they won't hang out where they aren't wanted. Was it some trial run on this tech maybe? :-) It's designed to be just outside of hearing for adults so only kids and youth can hear it. Did a simple test with our daughter and she can hear quite a bit higher frequencies than we can so apparently it's a thing. Except I can hear higher frequencies than my wife so not very useful I guess.
- GrumpyNl 2y agoI had something similar, when i was young and walking the dog in the evening, i could here a high pitch tone if they had the tv on when i walked by houses.