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    • Big brain time
      shdha 22d
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    • Negative frequency. It's what's used on noise cancelling headphones.
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    • Ever type a comment then go "Nah, it's not worth it" and delete it?
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    • They are able to set up microphones and speakers capable of recording sound and playing back the inverse frequency, causing the two sound waves to cancel each other out
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    • Audio engineer here! Theoretically you can actually do that! If two sounds are playing that are 180° out of phase then they cancel eachother out and it results in silence! It's a common issue when mic'ing something like a snare drum and it's how noise cancelling headphones work.
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    • Well technically u can play the reverse frequency of everything at one time and the would be no sound (same way they do active noise canceling in headphones)
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    • Science time bitches. Sounds are a wave, each with a specific frequency. Imagine the waves like a an ocean, if you had an equal and opposite wave you could essentially "cancel" the waves. So if you knew the frequency of people talking or whatever it is, you'd just need the opposing frequency blastin
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    • This isn’t stupid more just a high thought.
      av43 20d
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    • I mean if you know the exact wavelengths of the sound of the room couldnt you offset them perfectly when it reaches the ear to cancel out the waves? Theoretically of course, it seems damn near impossible to actually pull off
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    • I think I heard somewhere that sound canceling headphones send back a complete opposite frequency so if you blare that it may work?
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    • Its called lo fi bro, if that doesn't chill out a room then find a better room
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    • You could play the opposite frequency of that that's going on in the room, then it would be silent. That's how noise canceling headphones work.
      Ausch 22d
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    • It is possible to make a room silent with noise though. If you produce a sound wave of opposite intensity to the ambient noise, it will level out in the aggregation.
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    • It's called white noise. There are different colors of noise, but your brain can learn to ignore white noise no matter how loud it is, and it can drown out all other sounds.
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    • If you play the exact opposite frequency of any noise at the same decibals at the same time you will hear silence. There will always be some processing time lag but less than a milisecond and our ears can't tell the difference. Imagine a giant silence speaker full volume in public as a prank.
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    • In reality, you should play the opposing frequencies of the noise in the room. This is how noise cancelling headphones work.
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    • All of a sudden everyone on here is an expect on noise canceling, talking about inverting frequencies like that's a thing lol
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    • Technically you can. If there is a specific sound you want to mute, all you need is another sound with an inverted frequency to the first sound to cancel the noise. That's how noise cancelling headphones work
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    • Weird how the absent of silence actually has noise though. You can literally go insane just sitting in a room in silence for a couple of hours
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    • That's actually possible, if you use the right frequencies you can cancel out noise to create silence, but it has to adapt near-instantly.
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    • It’s technically possible if the sound waves travel at the opposite frequency and decompose molecular anus rays equivalent to I’m making shit up why u still reading this
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    • This got me thinking, if you’re born deaf how does the little voice in your head work???
      W_L_A 19d
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    • It can't be recorded it has to be live feed. It's called active noise cancelling. Some times things sound dumb until you realize it's already been invented.
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    • Noise-cancelling headphones, if I remember correctly (probably not), emit a frequency that cancels out surrounding sound waves when they penetrate it, so if you just did that but with an entire room, it might be possible.
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    • Well actually this is possible you just have to record a really loud sound then play it at full volume on all the speakers so everyone goes deaf
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    • “What if...” the op knows it’s not real or possible.. just contemplating ...
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    • This technology is being used in noise cancelling headphones. They will detect noise outside the headphones then project sound waves of opposite wavelength, cancelling nearly all exterior noise. Makes for a great music listening experience and highly suggest purchasing if you love music like me.
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    • They actually do this with Apache helicopters. They record the sound of the helicopter then invert it and play the inverted sound on loudspeakers and the sound waves cancel each other out.
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    • That’s technically how noise canceling headphones work they record the sound of the room and playing the same frequency but in reverse in your ear that’s what that hissing sound is
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    • Just play the opposite frequency
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    • But... you sort of can. It's called noise canceling.
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    • Why is he being made fun of hes saying what if he could not what if I or somthing along those lines
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    • Noise canceling headphones be like
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    • i get what op means, portable silence. like noise canceling headphones but for the whole room
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    • Look up how active noise cancelling works you totally can given the right hardware
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    • You need active noise canceling technology to do that but I believe it’s possible
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    • Pretty much how it works. When the PA system went out in our huge “open plan” offices, you could hear every pen drop, murmer, paper crumple, etc. It was very loud. Turns out they had always played static on the open mic at low volume to drown out all the noise and give everyone a sense of “hush”.
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    • Actually some libraries used to use low frequency sounds that we can’t hear to mask other sounds, essentially playing silence, turns out it’s horrible for your hearing
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    • She's wrong but she's also not wrong... Noise canceling headphones uses pitch to cancel others out. There is a possibility this can be replicated on a larger scale...
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    • he said "what if" so it's not like hes retarded
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    • That silent room makes you hallucinate and hear your heart beating
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    • Issa what if statement, he's not implying that it's possible.
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    • He said what if, dumb shit. Bashing hypotheticals doesn’t make you seem any more intelligent
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    • Apparently frequencies cancel each other so noise cancelling works by emitting the opposite frequency
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    • Isn’t that how noise canceling headphones work
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    • You could do something similiar to this. If you play the opposite frequency then the sounds cancel out creating "silence." While the concept sounds simple it is very difficult to perform on any sound other than a simple frequency. This is how sound canceling headphones work
      VicyX 22d
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    • Active noise cancellation is very much a thing.
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    • No, but you can blast inaudible noise frequencies, pitches, hertz, and volumes, to really fuck with people, all the way from giving them nausea, headaches, dizziness, vomits, and in extreme cases, death
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    • You can however play the opposite sound at the same volume to cancel out noise, but this would be hard with speaking as our voices change in pitch and tone constantly.
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    • What if you put negative numbers into your microwave's timer. You could make popsicles in 30 seconds.
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    • Seems like everyone didn’t read the “What if” part
      C01N 22d
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    • Fun fact: in movies they actually record silence because turning off the mic or just leaving dead space would be noticable to the audience and doesn't sound like true natural silence
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    • I used the silence to create the silence
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    • This is a real thing called noise cancellation
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    • UMG copyrights your audio if you do that
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    • The real problem is when you record complete silence in your home but you pick up voices and now suddenly you have a paranormal problem and have to invite strangers into your home to talk in empty rooms, essentially defeating the purpose of recording silence for more silence.
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    • gblui 22d
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    • Me and my friend actually had this idea in high school where its like a speaker but instead of releasing soundwaves it sucked them in and then release the built up soundwaves as a huge sound blast
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    • He never said you could, he said he wishes you could
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    • Holy shit is that a motherfucking Ancestors: Mankind Odyssey reference!?
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    • Everyone's like "lol u dumb" but they do say "what if" so they're prolly saying that in a wishful way
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    • It says "what if you could" not "why don't people" this guy isn't retarded he's just wishing it works
      LoIi 22d
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    • Its called white noise
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    • You can. That’s how REALLY expensive noise canceling headphones work. They take in the noise around you and play the negative of what it is. Effectively tricking your brain into silence
      Nosxi 22d
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    • That's actually a stupid explanation of how noise canceling headphones work.
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    • This one made me think
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    • phase invert the frequency and then yeah
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    • Its called a flash bang
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    • Reminds me of that one book I read in elementary about the doldroms or whatever and they had stuff like subtraction soup that made you more hungry and in one part they turned up the silence
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    • This thought crossed my mind before lol
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    • OP discovers white noise
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    • 3 Copy FacebookPinterestTwitterEmail {{ shortRepliesCount }}
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    • The speaker would just make that annoying buzzing sound
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    • Is this an Ancestors meme? Nice
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    • Good idea. We’ll be sure to add that in the next update.
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    • Why would you blur the OP?
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    • Silence can be deafening in certain situations.
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    • Technically if you know the exact sound of the surrounding and it's consistent enough, you can make "destructive waves" that cancel it out.
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    • Ancestors is amazballs
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    • Record the room noise with a good microphone. Invert it and play it really loud.
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    • You could if you were able to make the speaker suck the oxygen outta the room
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    • What if you could take a video of darkness and then use a projector to make a whole room dark
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    • U can do that with the power of my stand: the sound of silence
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    • The silence is deafening
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    • I prefer the theory of blasting sound the opposite of another sound to cancel the others out.
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    • White noise. He's technically right
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    • You just play two opposite frequencies really loud and it’ll be silence
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    • i don't know much about science, but I'm sure there's some sort of frequency you could use to counteract noise causing vibrations creating a room where sounds cannot be produced no matter how hard you try
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    • He's saying what if tho
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    • That's called destructive interference
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    • Just play the opposite frequency
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    • That's kinda how noise cancelling works!
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    • What about putting on a sound so damn loud that you go deaf and silence is eternal.
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    • He knows it isn't real that's why he said what if :/
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    • The mimes would complain about the noise
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