if you can bounce a laser off of a surface that is picking up the vibration of their voice, you can eliminate the noise and hear what they are saying

anyone want to take a guess at what technology research universities are persuing?

I had an idea like that once in a story, except that it was a pair of headphones that could selectively cancel out certain sounds so that if you and your friend were wearing them, you could have a quiet conversation and hear each other even at a rock concert.

we already have that

Really?

there's two options at least

one is just noise canceling headphones with voice coms

the other is what shoorters use

yeah

headphones that cancel noise outside of a certain range so you hear normal stuff but the gunshots get blocked out

Aren't the shooting headphones just insulated headphones that also have microphones on the outside, so it plays what it picks up, but mutes itself if the mic picks up something at a certain decibel level?

yeah

and you can just block everything and have voice

1XJV circuit.

but anything within the range still comes through

its just a matter of magnitude

Oh, I thought nothing went through when the high decibel noise was happening.

noise in the magnitude can still drown out anything else

Excuse me, *2JV* circuit.

yeah, that's all possible

it's just magnitude filtering

Interesting

frequency filtering is something else

multiple people speaking in the same frequencies

and plenty of noise there as well

doesn't exist

I'm telling you this because I'm working on it. If it existed, my job would be done.

at least two vantages to it

one, be able to separate the frequencies

two, be able to get the frequency in the first place

that's where the lasers come in

you can test this with microphones easily

that's the first part

record a bunch of stuff and figure out how to separate it

second, figure out how to do it without microphones

laser intensity is affected by vibration

nope

well, that could work

but you'd have to get the microphone close enough

what if you could just point a laser from a distance

If a laser can detect the same vibration that a microphone does, but doesn't have to be close.....