h a l f b a k e r yPoof of concept
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One of the difficulties of riding a bike is people. They get in the way and they simply don't hear shouts or bells. This is especially true on mixed use trails where they are wearing headphones and running in the middle of the path. What's the solution?
Ultrasonic bike bells.
This will penetrate
past any noise cancelling headphone or even a loud car stereo, and put a warning directly into the brain of the person in your way. And since it can get more powerful the longer you press the button, you can reach out and warn people long before you would normally be able to shout, "Choose a side!"
Ultrasonic Interference
https://en.wikipedi...und_from_ultrasound
2 slightly different ultrasonic outputs interfere; the difference is the audible signal. [neutrinos_shadow, Jul 12 2019]
audio beam focuses on one area
https://www.mathwor...io-beamforming.html
[beanangel, Jul 12 2019]
"Dutch Reach" targeting graticule
_22Dutch_20Reach_22...ting_20graticule_2e
Gets cyclists away from the dangers of motor vehicles, and into the hospitals and graveyards where they belong. [8th of 7, Jul 15 2019]
[link]
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I'd buy one. I ride almost everyday, and it's dangerous when
someone isn't aware of folks around them. You ever tried
getting past on a sharp curve. Holy hell, you are lucky if you
survive. I understand we must all make some sacrifices, but it
shouldn't be at the risk of broken bones. |
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It's fine as long as the broken bones belong to other people. |
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The underlying overarching problem is mixed-use trails. In
the UK, there are growing numbers of combined bike-and-
pedestrian footpaths, which is stupid. Also, because of this,
people (and even cyclists) now assume that it's OK to ride on
any footpath, which it isn't. |
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Worse, cyclists seem to think that it's OK to ride on the roads. |
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[MaxwellBuchanan], That depends on the location. In my area, it is legal for bikes to ride on roads and sidewalks. Which is good considering we are constantly battling for space against cars who think they are gods. |
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Which is another great use of this bell since it should be able to penetrate car windows and blast the drivers out of the way. |
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Well, in the UK it's illegal. |
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Can you cite a statute where ultrasonic bells are banned? |
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Ba-ding. I meant cycling on footpaths. |
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//put a warning directly into the brain of the person in your
way// In fact, the person in your way will be completely
unaware of your ultrasonic bike bell, because they will not
be able to hear it. Hence the term "ultrasonic". |
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If it is just on the edge of normal hearing (say, 22kHz for a
young person; or less for an older person), then making it
sufficiently loud may make it just barely audible as a sort of
undefined impression. But (a) they will probably not be
able to locate the source and (b) any ambient noise will
tend to camouflage it. |
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... plus (c) if they do hear it, they may simply assume that there's a flock of giant bats nearby. |
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What I am pretty certain [unhelpful fool] is talking about is
ultrasonic interference speakers. See linky for a vague
Wikipedian description. |
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How can you be "pretty certain"? It didn't even cross my
mind that that might be what this is about, and I've been
thinking about that technology recently. That goes a bit
beyond a bell, too. |
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I've been working on (okay, admittedly only a thought experiment at the moment) a limited-range EMP-type 'assistive device' (okay [8th], 'weapon') with which to pulse the illegal motorized vehicles passing through my property on the TransCanada Trail (which is zoned 'person-powered vehicles only, except wheelchair/mobility devices'). |
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Now I want to attach it to my bicycle, triggered by the bell. [+] |
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[MB} I was wondering when someone would bring that up about ultrasonics. There is a workaround though. They have audio systems that can follow a person around a room so that only one person can hear music [link]. I think those could be repurposed. Aiming would be the complex thing. Perhaps just pointing with a gesture could be detected with a camera. |
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I worry about ultrasonics (even if audio-modulated). It's a bit
like zapping the eye with far UV - you can't see it, but it's not
a good thing. |
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^ We just haven't done the sciency thing and seen what patterns are helpful and what are damaging. Of course, it's a bit above the standard data sampling system unless the beaming product becomes a global fad. There is always computational models to help crunch the guesses. |
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[notexactly], it was the only use of "ultrasound" that made
sense in the context of a bike bell (not that "make sense" is
a requirement around here...).
My brain works in mysterious ways. |
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[Ian Tindale], Remember: slow traffic stay to the right. |
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That's the failure point at which all these problems happen. A clump of people with no way through is merely a group of self-absorbed people who have no concept that they are in a world with other people. This bell is meant to pierce through all their narcissism and remind them that they aren't wandering alone in a forest. Welcome to civilization, now make a path! |
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Just think of all the dogs you'll piss off with this. |
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//What someone could invent is a way or means for cyclists to
slow down or even come to a halt and dismount// Actually,
opening a car door can achieve all that and more. |
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For which reason we commend to you the latest BorgCo road safety innovation <link> |
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