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New Technology Uses Lasers to Transmit Audible Messages to Specific People (osa.org)
254 points by webdwarf 18 days ago | hide | past | web | favorite | 128 comments



If you want a sound in your year, you get a device for that. If you are a business wanting to notify people who trust you, you can give them devices or blast a speaker. This fills the use case of an actor distributing information to people who do not have enough contact or trust with that actor or who do not want the information (because they would willingly use their own device if they did). Most likely use cases: punitive or targeted spam, punishment (security alarm, military grade crowd repellent, thief targeting, etc). Also possible: misinformation, generating confusion and chaos, making people feel schizophrenic. Weapon in the making. Good uses are also possible - targeted communication to people who can’t hold devices (surgeon during surgery, vr headsets, helmet headphones, etc, but that’s too cheap a use case for such an expensive laser, so weaponization is more likely.


Those depressing sentiments reflect an unfortunate reality of our time. The world wasn't always bloated with spammy advertising, and I'm hopeful that fad will eventually give way to more human-friendly business models.

Yes, any new technology comes with potential for abuse. But I'm still excited that maybe one day this tech could be miniaturized enough (or deployed responsibly) to give me wireless virtual earbuds without having to stick anything in my ear.


A consumer always pays, whether by paying or looking at advertisements.

But the modern world offers nice alternatives now. I can watch movies and episodes without ads (thanks to Netflix), and can listen to all the songs in the world without ads (thanks to Spotify). Because I pay instead of watching ads.

A lot of platforms and products offer the choice between looking at ads or letting you pay.

But of course, everyone wants to have stuff for free without ads, but that's just not how a functional economy works.


Well of course, everyone wants free stuff without paying for it. That's just as much an economic principle as the one you brought up.

However, I don't think services which offer a free-but-with-ads-version are the issue here. After all you could just not use those services.

I think the way bigger issue is the ubiquitousness of advertisements/spam in our daily life. Most e-mail traffic is spam. If you walk around in your city you most probably get to see an ad every couple of meters. And this is not just your local butcher putting up a sign with today's specials. These are footholds of international corporations which manipulate your emotions so they can sell you their shitty products (Oh, I forgot, it's not shitty, after all if I believe the ads your corporation somehow has some deep connection to my family life and that's what makes the product so great!)

How it ever got like that is insanity in its own right. Now giving these public space polluters another tool for manipulating people? I can't see much good coming off of it.


That’s a very bright view that doesn’t fully account for reality: Netflix has a tiny sliver of humanity’s film archive available, and while Spotify fares much better it still excludes a lot of content. In general you cannot pay to see the missing pieces in either, they are simply not available anywhere.


I grew up listening to rare classical treasures. Many of these were bootlegs of live performances by legends. These recordings will largely not last.


At one point the TV was without ads too!

My point: a netflix with ads will be more profitable than one without. However they cannot get away with that right now, competition, etc. Maybe never, but there's a reason ads came around, even for people who paid for television.


Of course getting people to pay twice for the same thing is more profitable. It is also far less sustainable in a competitive market.

With time is money and media backlogs many would rather just use their Steam backlog or DVD library.


It still is, if you watch only the BBC in the UK.

Of course, people still moan about “being forced to pay for it”, even when you tell them how to legally stop paying for it.


You can't legally not pay for the bbc and then watch, say, ITV, though.


You can if you only watch ITV through thrir online catchup service. When the UK government closed the “iPlayer loophole”, the new rules covered literally only BBC iPlayer.

At least, that’s what the TV licencing website says, I don’t know the name of the actual law so I can’t look it up.


How would you do that?


The requirement for a TV licence is specifically “live” and “BBC iPlayer”. Any online service that isn’t live and isn’t iPlayer, isn’t covered by the legislation; many (most?) of the other UK TV broadcasters have their own online catchup/on demand services.


Can't we just make (targeted) advertising illegal? It would solve so many problems ...


You’ll get more ads that don’t relate to you, so you’ll feel like there’s more advertising.

If you don’t want to be bothered by ads, we probably need better targeting, not a ban on it.


Nah only regulations will work from a tragedy of the commons situation. Look at Spam email - that shit is clogging systems and leading to a relatively massive overhead. Because they can make 1/100th of a penny at 1/1000 a penny in cost they will just keep on doing it indefinitely - damn the externalities.

I am very unimpressed by targeted advertising - it seems to be more a metamarketing thing since clients think they are getting more while the suggestions only gather enough to be creepy and useless compared to "what am I looking at right now?". I accidentally managed to flip Youtube ads gender targetting in a ham fisted way once in a week despite me telling them already.


So you’re saying you’d like targeting to be better?


I'm currently seeing ads for a product that I just bought and don't need to buy again for at least a year ...


So you’d agree better targeting is needed?


> You’ll get more ads that don’t relate to you

Great! That means they're less likely to influence me.


This could also be a boon for the faith healing industry.


He already mentioned misinformation.


My first thought was adaptive surround sound. So everyone in the room got the perfect sound. Also a speakerphone that only you can hear would be nice


I think it would make a great alternative to headphones and desktop speakers.

It would be perfect for an office computer, or an arcade console.


I suppose it could be used in espionage situations where it would be too risky to carry a receiver.


Or I'm a spy and I know people will be triggered by on body devices...


Or I just want to cheat on a game show.


Or in the casino.


Imagine the scary future of retargeting.

- Doctor, I hear voices in my head

- Don't worry, it's just ads


* Futurama - S01E06 - Didn't you have ads in the 20th century? - YouTube || https://www.youtube.com/watch?v=XPGgTy5YJ-g

Leela: "Didn't you have ads in the 20th century?"

Fry: "Well sure, but not in our dreams! Only on tv and radio...and in magazines...and movies. And at ball games, on buses, and milk cartons, and t-shirts, and bananas, and written on the sky. But not in dreams! No sirree."


I wonder if you could, with the right combination of technologies, induce schizophrenia in a subject. Of course since I am in Europe my wondering will not be turned into a DARPA grant.


More fake than induce without the disordered thinking that comes along with it. Normal people can hallucinate under stress to some degree and it can be shockingly subtle and non-disruptive. Like thinking their downstairs neighbor is being noisy but it turns out they were away on vacation.

Interestingly the tone of hallucinations is very culturally shaped - western ones tend to be more negative.

Artists with schizophrenia tend to produce interesting degrees of abstraction which seems to be "accidental" as opposed to deliberate. Interesting but sad of course.

https://www.bryancharnley.info/self-portraits-2/charnley_sel...

If one wants to cause mental illness we already know how - isolation


The problem is that suspending one's ability to think clearly by preventing them the silence to do so can have as great an effect on mental illness as isolation.


"Consipiracy theorists" have said the government has had this technology for a while. I've considered this particular one to be very likely to be true, because even before this story, it was just so obvious it should be feasible with basic science. I could think of a couple of basic ways to beam "something audible" (not necessarily "sound" but something that would be audible to the system as a whole) into someone's head even with just my understanding of science.

One of the ones I've considered is that we already have the ultrasound beams that others are discussing, publicly available for years, to the point I've heard them at the supermarket [1]. I suspect with just a slight tweak of the math, you could make it so that with two emitters you could create audible sound that exists only at the intersection of two beams, for instance. And that's just one idea of how this could be done; by no means am I claiming it's all of them. Even if I'm wrong about this one, something will work. Sound is so basic and simple that it is logical it can be produced by all sorts of things, because we already know from experience it is produced by all sorts of things.

This is initial research from a public team. I see no evidence from the story that they used any tools that haven't been available for 40-50+ years, albeit not as cheaply or as compactly, of course. (i.e., in contrast to the ultrasonic beam which actually requires non-trivial computational power to attain) I don't find it very hard to believe other non-public entities have the refined-over-decades version of this idea.

Combine this with a bit of chemistry and yeah, you could probably play some serious mind games with people. From what I see, it would be easy, like, give the Mythbusters a couple of weeks and take all their scruples away and they could probably bash out a "plausible" prototype of the process from where they are (not terribly expert in the relevant fields). Even just publicly-known psychoactive drugs provide a lot of tools to play with.

I am not claiming that if this technology does exist that it is being used for any particular purpose. I'm just saying with all that black budget and the obvious utility to intelligence agencies of such basic technology it's very easy to believe that they have it, and that they have for a while, because it isn't some wild hypothesis about unknown science or new forces or aliens or any sort of thing they're suppressing from public knowledge, but rather a fairly boringly-straightforward application of relatively basic science, as shown by this exact article. An infrared laser and some modest cleverness in what you do with it. Other comments speculate about putting together a DIY rig to do this. Not complicated.

[1]: They experimented with playing ads to people waiting in line to checkout. It must have been deeply unpopular, it didn't last long. As a nerd I enjoyed the chance the first couple of times to hear it and play with the parameters and see what happens if I bounced it off my cell phone, how sharp the boundary was, and such, but it would have gotten old pretty fast after that, and most people wouldn't even be that entertained.

Edit: Another example of the sort of thing that I think could lead to sound production with some tweaks, here's a video from 2014 of a mid-air laser system generating enough plasma in the air to be visible: https://www.youtube.com/watch?v=GNoOiXkXmYQ You can hear it makes a very characteristic squealing sound. Do something less violent (much, much less violent) to someone's body, and what are the odds that you could get sound out of it with some years of development? There's just so many avenues to create sound, one of them is going to work.


Do you have any sources to back up your claims about supermarket ads?


Schizophrenia has multiple symptoms. Currently there's only "hearing voices".


hence the phrase: right combination of technologies.


Missed that, sorry. Maybe with a psychotic pill (like there's atypical antipsychotics)


Eh, seems like it would be a lot easier to drive someone mad via age-old gaslighting.


I wonder if tin foil can block this :p


Please don't.


Reminds me of that black mirror episode where you had to pay to mute commercials.


That’s not Black Mirror, that’s Tuesday. Meet Google Contributor: https://www.zdnet.com/article/sick-of-ads-now-you-can-pay-go...


And apps. I hate flashing ads, I always pay the extra to be left alone. But I wonder, how many have fake, extra annoying ads? It's almost like extortion.

But as technology progresses, I can see a future where AI and facial recognition and this targeted sound will torment every person, everywhere they go. The more recent Time Machine movie showed a bit of this.


Henry Kuttner and his wife C.L. Moore described hyper-aggressive physical ads and ad-blockers in the short story “Year Day,” published in '53. Notably, the anthology that first included the story is named “Ahead of Time.”


- Google, I hear voices in my head

- Don't worry, it's just ads.


Since this stuff is based on lasers, don't we have to be in LOS for it to work?


Yes, but the laser is IR. So what is and is not transparent is different from visible light.


Reminds met of the book series Daemon by Daniel Suarez [0], only there they use nonlinear acoustics to get this effect (if I remember correctly). Nice books, nice ideas by the way.

Edit: They call it Hypersonic Sound System, not nonlinear acoustics, see [1].

[0] https://en.wikipedia.org/wiki/Daemon_(novel_series) [1] http://daniel-suarez.com/daemontech.html


The hypersonic sound system was kind of productized years ago as the "Sound Lazer" among other things. The effect is really quite stunning! It is a truly strange effect. But, as the manufacturer themselves state, it involves pointing an array of 120dB ultrasonic emitters running at full blast, even when it is transmitting silence. It's an oppressive feeling to be in a 'loud' room, yet not be able to hear anything.


Really great, underrated series. The book was also very prescient in predicting rise of a distributed digital currency, especially given that it was published before Satoshi's Bitcoin paper was published.


I agree! I have been looking for the same epicness in his later books but it never hit that level again imho.


I don't think it's quite analogous - everyone could hear the sound, the technology in Daemon just allowed it to appear to emanate from a specific, arbitrary location.

But very reminiscent, and a great series.


Can't wait till rogue arrays of lasers start beaming advertisements directly into your ear while walking down the street.


That's actually been done, although no lasers were involved. You can modulate an ultrasonic beam with an audible sound in such a way that someone hit by the beam will hear the audible sound. Ultrasonic beams can be focused into a fairly narrow region. See [1].

They used this in an ad in New York in 2007 for the TV series "Paranormal State", which was premiering soon on A&E. It was a paranormal themed reality show. They had a big billboard for the series on the side of a building, and Holosonic's "audio spotlight" technology on the roof that sent two beams of modulated ultrasound down to the sidewalk.

Pedestrians who walked directly into the beams would hear a disembodied voice whispering creepy things like "Who's there? It's not your imagination", but someone next to them who didn't enter the beam would hear nothing. Here's a video [2].

Here's an article about that ad campaign, and it also mentions some other ad uses of the technology [3]. Interesting quote from it:

> Joe Pompei, president and founder of Holosonics, said the creepy approach is key to drawing attention to A&E's show. But, he noted, the technology was designed to avoid adding to noise pollution. "If you really want to annoy a lot of people, a loudspeaker is the best way to do it," he said. "If you set up a loudspeaker on the top of a building, everybody's going to hear that noise. But if you're only directing that sound to a specific viewer, you're never going to hear a neighbor complaint from street vendors or pedestrians. The whole idea is to spare other people."

[1] https://en.wikipedia.org/wiki/Sound_from_ultrasound

[2] https://www.youtube.com/watch?v=qwAeb3RBZ1Y

[3] https://adage.com/article/news/hear-voices-ad/122491/


This is beyond creepy. Words fail me.


Hopefully the ad tech uses the lower-acoustic-clarity method mentioned. It'll be like bus driver announcement white noise. "Wah, wah. And if you wah wah wah, visit wah wah wah dot com today."

Edit: I also wonder how it works if you modulate or otherwise moderate the interface between ear surfaces and ear-surroundings moisture, since that's apparently the resource this method needs in order to work at all. Shopping with headphones on can be a pretty nice experience IMO, and maybe it doubles as a countermeasure.


Yep, this is going to be Altered Carbon or Ghost In The Shell type of crap. Whatever you Google for will follow you everywhere, and nag you until you buy it...


Precedent suggests that it'll nag you after you buy it... maybe both.


“We noticed you bought a gravestone for your mother. Your mother‘s birthday is coming up soon, would you like to buy her a box of chocolates?”


Also here’s 15 other gravestones to complete your collection.


People who looked at these gravestones also bought these zombie movies.


“… and that led me to werewolves, which is how Amazon turned me into a furry”


Other furries also liked these dog bowls


Why not just play it over a speaker like is often done?


Well, now you can directly target people so personalized ads when you're walking down the street. I'm scared it would devolve to pseudo-hallucinations ('did you hear that?').


Or subliminal messages/mind control. I imagine psychiatrist visits would be up due to this annoying voice in peoples heads. lol.


Because then it's obvious where it came from. Much better to spam people anonymously from a distance.

People annoying other people with laser pointers is going to become _so_ much more annoying.


> People annoying other people with laser pointers is going to become _so_ much more annoying.

True. Antisocial behaviour gets orders of magnitude worse and more prevalent once you can actually make money with it.


Coz then you can personalize and target?


> The ability to send highly targeted audio signals over the air could be used to communicate across noisy rooms or warn individuals of a dangerous situation such as an active shooter.

This strikes me as a rather bizarre example to use. What's special about active shooters that would warrant using lasers to beam whispered audio messages directly into someone's ear?


Maybe it represents the ability to say "Hey you, stay put, or go that other way; the shooter is right around the corner" from, say, an overwatch point or a drone or something? In that case you wouldn't want the shooter to know. Beats waving your arms like crazy. Just spitballin' here.


It's just one specific use case for this technology that came to mind for the researcher? Mass shootings are a pretty big deal, even if the odds of it happening to anyone is fairly low. Risk mitigation and death prevention seems like a pretty healthy choice for applying this technology, as opposed to saying something like "This could let someone beam targeted ads that only the target can hear!"

"We made this thing, I wonder what we could potentially do with it that would benefit people as much as possible?"


When getting money from the grant system, the grant providers are not neutral parties objectively deciding what the best science to do is, since there is no such thing as an objective, neutral party. The grant authors learn to tell the grant writers what they want to hear.

This is part of why we get such a stream of stories about amazing new breakthroughs in solar, battery capacity, terrorism reduction, etc. that never seem to come to fruition. A lot of times they were never for that purpose anyhow, really; it was just a paragraph tacked on to get the grant.


A sad sign of the times, and it looks like the researchers were in the USA. Perhaps the media people thought this angle with garner their invention more attention.


My thoughts as well. I can almost guarantee this will be used for advertising.


The principle seems simple. It's too bad that 1.9 μm laser is neither easy nor cheap to obtain. Otherwise it could be doable for DIYers.

I imagine you can certainly drive people crazy with this thing. For some one who doesn't know this kind of technology's existence, it's pure magic.


There is an alternative method to achieve similar results using very high frequency (40khz in the case of the video below) audio as a carrier for audio that is within the human range. It modulates the amplitude of the carrier signal (in the same way that AM radio does). The high frequency audio interacts with surfaces it hits and kind 'self decodes' into human-perceivable audio. It's doable by DIYers with a little electronics knowledge, too!

https://www.youtube.com/watch?v=aBdVfUnS-pM


Two big caveats with this tech (from the paper):

- it's really silent. They claim that the signal is audible, but under pretty much ideal conditions.

- creating arbitrary sound with this approach is hard. Each laser sweep generates a sharp wavefront that is audible, but that only eorks ehen the sweep is at the speed of sound. This limits the frequency at which you can emit those pulses and their shape is fixed, too. The only really changeable property is amplitude.

Not sure if this can be turned into a reasonably high quality source.


They mention 2 methods in the article, the sweep method, and plain old modulation. If the 2 methods could be combined it might work better.

The sweep could be sped up by several orders of magnitude, and the modulation could be coordinated with it to create traveling pulse trains toward the listener that would have higher fidelity.


The sweep is fixed to the speed of sound or else the whole trick behind it falls apart. The paper describes that in length.


Yes, but the point of sweeping seems to be to add energy to a traveling wave front. You can still amplify the wave by sweeping faster and bumping the power at the appropriate time, but you would gain fidelity because you're not limited to single square waves.


No, the amplification can only work at the speed of sound, neither faster nor slower. The paper analyzes how the wffect falls apart when you deviate from c.

What you possibly could do is to have multiple laser beams forming a sweeping comb pattern. Depending on dispersiom and other effects, you might be able to do some waveform shaping. But that is very elaborate for a loudspeaker.


That's like saying audio over radio waves can only be sent with spark gaps... you simulate this "sweeping comb" with a fast sweeping, and even faster modulating laser.


It states 60db - that’s normal conversation volume. Does the paper say otherwise?


I could not find a reference to 60dB in the paper. It states 30dB SPL in the relevant plot, which is very quiet.


"In the lab, the researchers showed that commercially available equipment could transmit sound to a person more than 2.5 meters away at 60 decibels using the laser sweeping technique"

Granted, the laser sweeping technique trades off fidelity for the volume, this is still just laboratory tests and is not a "final product" in any sense.


This claim still isn't in the paper, though. Not sure why the press release makes this much bolder claim. Seems a but weird to me. If I had the measurements to prove that, I'd include them in the paper.


I love all the innovation that's created to warn us about active shooters, all to let the active shooters keep their guns.


That scenario seems contrived if you ask me. How likely is it that one of these expensive laser devices will just happen to be available at the scene of an active shooter incident? And if so, what advantage would it have compared to general PA announcements?


These are not the robots you're looking for. You can go about your business.


Take them, they'll build more. It's metal, for fuck's sake. Not rocket science.


There are lots of conspiracy theorists all over the world who suffers from schizophrenia and other mental disorders, many constantly claim to be the victims of a secret human experiment project by the governments in the past 30 years. They believe the governments have developed a psychological weapon which can directly control one's brain and the neural system though electromagnetic waves, including the ability of sending a "directed voice" straight to someone's head, and they are subjected to such torture everyday,

Apparently, now their science fiction is finally partially realized...

Of course, the possibility of having a practical weapon is low, while the chance of these conspiracy theorists being the actual victims of a human experiment is practically zero. But I personally do believe the R&D of such psychological weapons do exist, and this is how the non-fictional part of the conspiracy fiction originated. Related published researches is what they used as a foundation to justify it, now they just get more materials... And well, this "mental control" meme has been around since a long time ago, since the age of radio.


It would be cool if it were possible to make multicast-like transmissions using this tech.

I can imagine a rock show where the whole band goes straight into the mixer, and instead of speakers PA uses this laser tech to transmit the sound to listeners.

If you are a person who for some reason doesn't receive the transmission, it must feel very bizarre: the only acoustic sounds would be band playing the instruments silently, vocalist singing without any amplification, crowd noises.

It would be a paradise for people making / receiving orders at the bar with the live music going on.

Or imagine a night club where people on the dance floor receive music very loudly, but people outside of it receive it at a conversational level.


This exists with current technology, they're called "silent parties"


Reminds me of the way AR was implemented in the book Change Agent[0] - there were devices there using lasers to beam additional visuals directly into your eye. And, AFAIR, you had to wear laser-blocking glasses when in the city, because advertisers would abuse this tech to beam ads straight to your eyes. Anyway, if we could build that, and connect it with (improved version of) the tech from this article, we could have AR that doesn't require you to actually wear anything.

--

[0] - A good biotech sci-fi; I liked it and can recommend it. Speaking of which, if there are other "biopunk" books out there, I'd love to know.


There are stories of people having their orthodontic braces act as a radio antenna. Only the person with the braces would hear something.

This writeup is short: https://www.recordonline.com/article/20091118/Health/9111803....

There's also a (busted) Mythbusters around picking up radio signals thru fillings.


It would be so cool if that's the way how radio technology was discovered.


No, that was absolutely not what happened. The discovery of radio waves happened in two parts: first, Maxwell completed the fundamental equations for electrodynamics by postulating that a temporally changing electrical field must be creating a magnetic field around it. Otherwise the behaviour of plate capacitors would be inconsistent. This brought the equations into a form that rather obviously allowed the derivation of a wave equation. Then it took about 20 years IIRC until Hertz managed to prove in his lab that these waves exist and can be both created and detected.


Sorry if my bad grammar gave you the impression I thought that is how it was discovered.

A sound only I can hear? This could be used to drive someone crazy, commit suicide or some other horrible task - phishing God.


Go on, I'm listening.

-- The Pentagon


This could not drive anyone insane as it could be easily blocked by covering the ears or wearing earplugs and it's a good thing..

I could easily see this being adopted by cheaters in passing exams:)


This would be a nice alternative to headphones/PC speakers for many use cases. What angle to the ear does it need to be? I.e. can the laser be directly in front of the listener?


Lasers can also record sounds through window vibrations. Now they can be targeted transmitters too. They could continuously record and transmit sound and tailor the messages to real time conversations. Seems like high potential for abuse.

For example, sharks with giant fricking laser beams that convert shark thoughts to audible sound that gets louder based on target's voice level.

Or government, millitary, and adtech abuse.

I'm not a big regulations person but see value in them in this case.


Or aim the laser at another drivers rear window and tell that idiot to slow down!


So, do noise reducing earplugs thwart these things?

and screw the mindset that active shooter is the "cool use case" for something like this. Jesus christ - if these people had imagination, how about the fact that it can be uncomfortable to always have a device sitting in your ear canal - maybe it would make a good headset for a phone conversation sitting at a desk - you dont need a thing on your head/in your ear to be able to converse on a call..


I remember reading about the US military testing a similar technology last year http://blogs.discovermagazine.com/d-brief/2018/03/26/militar...


I remember watching a Ted talk about directional audio "Woody Norris: Hypersonic sound and other inventions" which focus's audio like a laser.

https://www.youtube.com/watch?v=HF9G9M0cR0E - very interesting to watch.


U.S. intelligence had this tech 20 years ago. I'm pretty sure I read about it on cryptome in the early 2000s.


I don’t understand it entirely. What do they mean when they say they are sweeping the laser at the speed of sound?


This is unintuitive: the laser makes air heat up and expand. This is how the acoustic waves are created. But this alome is not enough for audible sound. Higher amplitude is required. They get it by "piling up" a wavefront (in colloquial terms) by moving the laser exactly as fast as the wave is moving away. This heats up more air and the additional expansion adds to the already traveling wavefront.


Was this used on US diplomats in Havana?


No, that was probably just crickets: https://www.reddit.com/r/worldnews/comments/acs1zv/the_sound... Thread includes sound samples.


That's an hypotesis just as many others. Investigators and medics who visited the patients say they don't know. Source : yesterday's arstechnica's article: https://arstechnica.com/science/2019/01/canada-halves-diplom...


The sound heard around some of the possible attacks may have been crickets, but that doesn’t explain the symptoms.


Could that not have been a sound effect (audio file) transmitted via a technology such as this?


There is a video on youtube that explains how to do it with ultrasonic speakers; https://www.youtube.com/watch?v=aBdVfUnS-pM


This would be great for telling that idiot driving five under in the left lane to move over, except for cases where I am that idiot. Then it would feel less great.


Wish we could print plasma coils into the air and energize them. Magnetic force on demand, wherever you need it.


Seems like this would have positive applications in VR/AR/Movie Theaters/Holodecks...


I wonder how the sound fidelity is like, how is the bass response on it?


Looks like active noise-cancelling headphones are the new Adblock


Thanks osa.org for not spamming me with ads and cookie-popup.


[whispered] “advertising” [/whispered]


...or eyeball. :S

Oh, sure, it says it's safe...


i think this might be used to treat people with schizophrenia or other mental illness issues.

Imagine any negative or false perception can be corrected with a medical device.

"No, Janet. The butt naked dwarf with a pitchfork isn't real. Keep coding."


Old school .. whole lot of people say they heard voices in war, and military mission over 20 years ago




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