That's where the strange voices are coming from that I keep hearing in my head !
MIT boffins have used low-power lasers to beam audio directly into a subject's ear. The technique relies on the interaction between light and water in the air, a phenomenon known naturally enough as the "optoacoustic effect". In their experiments, the researchers found they could use this to transmit an audio signal which, …
The glass has terrible frequency response - the mass makes it a good low pass filter.
The room reverb is horrible - even with a good microphone at many feet from the talker in those big rooms adversaries leaders and diplomats favor with lots of reflective surfaces that don't absorb echos.
Other vibrations - passing cars, HVAC, elevators and what not....shake the glass really well.
Back in the day I helped write some code to deconvolve that kinda stuff....success was pretty iffy.
Not the water in the air, just don't move if you want to hear.
It will be interesting to see if there will be a real world use case at some point, or whether this will stay in the lab.
Love reading articles like this - technology applied in really creative ways - just because you can!
Why would you have to stay still? I would think that having ceiling mount lasers tracking your movement would be well within the capability of current technology.
In some dystopian future I could see Google/Amazon installing such a system in your local mall so it can whisper personalized purchase suggestion in your ears as you walk around.
"Think of how many ignorant audiophiles they'll be able to fleece with those..."
Obviously you can't hydrate the air in your acoustic onanism room with plain old ordinary water - you need to buy very special oxygen free water containing homeopathic concentrations of pure gold, otherwise the spectral laser frequency's dynamic response will be adversely affected by the laser's inverse reverberant resonance simulacrum.
Everyone knows that...
All the chuckles aside, I'm wondering about the real world uses like most here ?hear? ....
I know a couple of folks who *really* cannot wear headphones or earbuds. (autism can have some wonderful quirks) but would love to have music whilst working (I share this trait of being able to focus better while having music playing .... it helps with my ADD), and generally cannot have this as it becomes an environment conflict. (i.e they are allowed to have headphones or earbuds, cannot wear them due to physical reaction or as in my SO's case earbuds just *do not* stay in place due to the shape of her ears)
I actually wonder if the arrangement could be made light enough and non-constrictive enough to solve their issues.
But then I am a bit weird.
I suppose the other application would be to communicate verbally with the herd of laser equipped sharks.
There’ll only be two use cases for this:
1. Listen to soothing music through your skin whilst being tatooed by a giant laser or having your earwax hygienically vapourised.
2. Adverts. These ads will also know if you’ve been listening by detecting subtle changes in body temperature and pulse. If you haven’t been listening, the advert is repeated incessantly until you have. Or until you agree to buy whatever it is that’s being advertised monthly.