101–110 of 134 posts
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?
Imagine the scary future of retargeting. - Doctor, I hear voices in my head - Don't worry, it's just ads
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.
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: p…
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: p…
It would be perfect for an office computer, or an arcade console.
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: p…
This could also be a boon for the faith healing industry.
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
But very reminiscent, and a great series.
> 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?
Earlier quoted context omitted.
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.