Best LRAD System!... For Your Money
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- čas přidán 20. 10. 2020
- We test our DIY LRAD outside with a "volunteer" and then move inside to go over the details and build of the LRAD system. You'll see what speakers, enclosure, amplifier, electronics, etc. we use for this very affordable LRAD.
Video/site mentioned at 4:10
www.soundlazer.com/how-does-a...
Graphs:
drive.google.com/file/d/1kuLH...
Find us on Patreon and our website:
/ techingredients
www.techingredients.com/ - Věda a technologie
Why do I get the vibe this guy was part of the Manhattan project
Did you watch our video on hydrogen detonation?
Funny
Whats next home version of the Philadelphia experiment?
@@TechIngredients Classic!!
He teaches with the Feynman style, simplifies clearly w/out arrogance all while he is just as curious as we who watch his Chan
The absolutely dead pan delivery of "enthusiastic outdoor activities" had me laughing out loud. :-D
You beat me to this comment. Haha
dude is a genius and with a wicked sense of humor
Avoiding demonetization... and not getting involved
@@ulfpe i can understand why a smart man like him does not want to get involved especially after the stupid witch hunt of Chris Pratt on Twitter. got to stay safe from mentally ill people
It gets me every time.
You're like that cool older friend trying to teach everybody cool shit. The world needs more of you. Thank you brother.
“Enthusiastic outdoors activities.”
I absolutely love this channel.
The first time I ever heard why cone woofers and horn tweeters exist. Thank you!
Same here, very clear explanation
That's one of my favorite things about this channel. You come for the x but learn about x, y, and z.
since you read the comments I just wanted to thank you for the amazing content and for showing the scientific temperament. Its rare to see any teacher with that attitude saying like why would you believe me? well, let me show you! Love your vids.
"Enthusiastic Outdoor Activities" - that's a euphemism if I ever saw one.
Why, whatever could you be talking about, friend?
Burn, Loot, Murder?
@@justinwbohner Now Now don't talk about Law Enforcement like that :) Qualified Immunity is a myth right?
I'm unapologetically stealing the term. I've been looking for a snarky way to replace "Mostly Peaceful.
Acab
You are a teacher, right? You remind me of some of my favorite teachers. Great work. I'm 50 now and you bring me right back to school. Thank you.
I highly suspect that he teaches at MIT
I think I ran into him at happy hour oyster night out in the countryside while I was going to Boston U.
"You gotta admit: size does matter"
- Tech Ingredients, in a confident tone.
big pp energy
This comment deserved it's 69th like!
@@jannikheidemann3805 Whoever voted after 69 needs to be hung.
The bad kind.
@RenaissanceRepairman Oof that sucks
As an audio guy and a former FOH audio engineer doing live sound, I really enjoyed this video. But my favorite part was the description of the remaining parts as "Fiddly-Bits"
LoL
HUH?
I'm only 9 minutes into this incredible video and you have the most wonderful ways of explaining the complicated physics of Diaphragm loading and Impedance matching I've ever heard. I love how you're making these complex subjects so digestible. Definitely earned a subscriber today.
Great, welcome!
You should see his laser builds 😉
My absolute favorite thing about your channel is how you change the into depending on the topic and past content you've created, by curating an intro to the topic at hand. You're the best. Keep up the technical info !
"Ready?"
Me: Yes!
......
I was not ready.
Im bleeding from my ears
Ready to deafen everyone within a 10m cone
Kinda half expected the THX sound
@@saccaed ...as soon as I saw him reaching for the switch I had the volume done to about 10%
@@saccaed The Tiny Tunes version was the best.
"THE AUDIENCE IS NOW DEAF!"
Love the new intro. It's amazing that you're making such high quality, in-depth and practical (so not just animations, but you actually built all this stuff) for free to watch. Thank you.
You're welcome.
As always... excellent!
Excellent breakdown and explanation, as always.
Really enjoying catching up with some of your videos.
I have interests in many of the subjects you cover and enjoy adding to my knowledge of them.
My only criticism, and it's not present in every video I've seen,
Is the annoying "music" generated by u tube. Its horribly off putting for someone who enjoys real music! I enjoy a very wide range of genres but muzak just isn't good for anyone!
Otherwise, awesome work, as usual, nice one!
Another potentially dry topic, made extremely interesting and informative... wonderful demonstration, yet again.
Thanks for sharing and keep up the great work!
Have a great, safe weekend yourselves!
Cheers!
- Jesse
Utterly priceless education from the roots all the way to the blossoms. Epic generosity and enthusiasm!
The quality of these videos is simply amazing! Thank you SO much for doing it!
Nothing less from a True American Gentleman of the 20th & 21st century . Love to chat with him one day .
Every one of your videos answer questions I didn't even know I had. I love it! My brain loves you guys and I thank you for making the world a better place!
Human Test Subjects!!!! oh yeah... Subscribed!
Same :))
Not very funny when I am a human under attack
Im there brotha! I gots to know.
Great comment with good videos...oh yeah subscribed
No seriously your channels looks pretty cool
You have me feeling like I am missing something special in my life. I have an inquisitive mind but my father wasn't much of an encourageable personality. Would never blame him on how I ended up, I was never that disciplined. Your demeanor, your patience, the depth of your knowledge and even your voice. Well , with someone like you around who knows what could have become of me. Needless to say , you are amazing. Not that you are old, you do kinda remind me of my grandfather, whom past away when I was 5.👍🏼👍🏼👍🏼
Just the sight of the Tech Ingredients logo in the CZcams notifications makes me happy. Nice project, as always!
Your ability to describe physical phenomena is simply mind blowing. Thank you once again for a fantastic learning experience! Well done
Just found your channel. Very good! Excellent job with conveying the technical explanation without overwhelming those of us without a PhD in physics!
Superb clarity of explanations with acoustic coupling.
I just want to say that I really enjoy your videos. It is always really interesting to watch. Thank you for sharing your knowledge and for making great content to watch.
What a great channel and an amazing inventor! Thank you so much for all your great videos and web site as well!
One of my favorite things about your videos is that you ALWAYS say "we" or "us" - sharing credit with your son/partner/team. So glad I found your videos on here. Keep up the great work dad!
We are all the same thing so yes. As a collective whole there's parts that are humble with the knowledge. Just know this video may grab the wrong attention so save it.
Dude first time viewer of the channel and I must say you are amazingly awesome at taking a highly technical answer and organizing it in a series of micro explanations that are simple to understand thus letting them really sink the subject into the brain. You also have the marvelous ability to make the explained micro answers happen in the correct order as to eliminate confusion of the total picture. Kudos sir this 30 year old young buck is now building 6 LRAD units it looks like and only doing so due to your amazing ability to create killer content that makes sense of a subject I knew "none-ya" on 20 mins ago so keep it up please your great for it
Thanks for keeping up the great content!
"Because of all of the enthusiastic outdoor activities that are occurring in our major cities"
I will make and use one of these. Burners, Looters, Murderers BEWARE.
@@robertredbeard1855 as long as the city kitties stay in the city to kill each other, I can only wish their campaign of domestic terrorism a swift and efficient self genocide.
Maybe then american society will of lost at least a large portion of the incompetent people. Since covid-19 seems to be slacking off...
Yes!! Especially DC and the Capitol. What a bunch of traitors!!
@@vid2ification Right. Stop feeding them, and they'll eat each other.
@@vid2ification The problem is the Klan, Oath Keepers, Proudboys leave suburban and rural churches and join the police departments in the cities! No justice...No peace. Incidentally, There weren't that many "city killers" on the capital on 1/6 or participating in those mass shootings.... but go ahead and keep your head buried in the sand.
Great video and channel. Very detailed information and explained very well. I just love learning about random new things, and appreciate how much effort you put into editing to explain such a detailed topic so effectively.
I love your stuff and especially love the extremely detailed explanations. Please keep it up!
Remember, hearing loss is cumulative and permanent!
What?
What?
Mawp. Mawp.
zzzzzzzzzzzzzzz
I can't hear you! Can you please speak louder?
I can't say that I need an LRAD system but I can't wait to watch this one.
I don't need one either, but I WANT one. I'll abandon my giant organ-pipe project and built this instead.
I didn't think that I needed one, either - until I watched this. Now, I wonder: how large of a unit I could fit on the roof of my car?
Amazingly high qualitative and educational videos! Thank you for sharing your knowledge!
Extremely informative and educational. I have never heard phasing explained so clearly. Thanks!!!!
I honestly don't know how you do it, even though I was never particularly good at physics and the like, I can understand perfectly what you're explaining. Great job as always, can't wait for the next one.
Was it the killer bees?
As one smart man put it: If you can't explain it simple, you don't understand it enough.
It's not that you're bad at physics, it was probably because information wasn't presented to you in a clear way before
@@kiyoponnn meh... Yeah... But also... There are a certain number of people that WILL understand these things...and another group of people that will NEVER understand these things....
Perhaps those that will never understand like enthusiastic outdoor activities...
@@fordfiveohh Are you're referring to this? en.m.wikipedia.org/wiki/Intellectual_disability
I was speaking about the general population
After watching this vid (or any other of yours) I'm feeling like a professor now. Great Explanations!
I always look forward to your videos. I know I will learn something. Your work is very high quality. Your explanation is thorough and demonstrates profound research and knowledge. I wish my physics lecturers were as good at explaining as you are....and as knowledgeable too. Keep up the great work. Thank you for the work you do.
You continue to amaze me with the plethora of knowledge that you have. Not just general knowledge, but detailed technical knowledge. And you have a way of explaining it that makes it easy for us common folk to understand. I know there's been some speculation on what your career might be, and you almost denied one profession that I am aware of. But to think you would not be involved in higher education in some form or fashion is a stretch. You are so comfortable explaining things, and doing so without a cue card or anything. You're also able to nail segways and move through the important points you want to cover, again without cue cards or notes. I continued to be amazed and I love this channel. I have told numerous people about it and made some of them watch all or part of one of your videos (whether they wanted to or not). Please keep publishing the videos, this is one area of my life that continues to challenge and exercise my brain, and I love it!!! Thank you for all you do, I know the time spent preproduction and postproduction for a video is about 10-15 times longer than the video, so I know its a lot of work. Please know that work is equally appreciated!!!
Thanks!
I never actually denied anything. Watch that video again and you might figure it out.
Having once taken apart a megaphone similar to the Pyle megaphone you showed at 17:00 the driver is actually in the back of the horn. It's folded twice, with an inner 1st horn hidden underneath the 2nd horn, which is then reflected out to the primary horn.
I mounted a 1/4" tube fitting to the end of the megaphone driver I disassembled and turned it into a very effective talkbox.
Thank you for this video. I am building one for my neighbors that like to party until 5am.
Mine go till 2.30. But the subwoofer is the real enemy.
So did you build one?
Very clear and simple explanations from someone who clearly knows what he is talking about. The comments about interference, nodes and anti-nodes was fascinating.
God bless you, your description has been like what I felt in College, great .
Well, I now have a game plan for my DIY Bluetooth speaker’s highs and mids…
Finger’s crossed for a video before next summer that gives me the info for an eyes-bleeding bass system that looks amazing, sips the watts and costs less then my first car. 😁
Thanks for all that you do, man. Your videos’ “shit learned to time spent” ratio (SL/TS) is among the best anywhere.
It would be super cool to have some video explaining your background and how did you get to the level of knowledge you have now. I understand that you might want to keep it about your work and not about your person, but I believe that showing your journey might inspire some people to pursue engineering careers and help them in their journeys :)
that guy is clearly on another level. U cant study yourself into a fucking genius
@@bernardo00124719 How do you think he got there? By studying, man!
@@PedroHenriqueKopper naw. he is like a sponge near water. knowledge just pours into him.
@@bernardo00124719 you make yourself susceptible to the knowledge. It's a practice to learn. Let him take credit for his knowledge.
Why? You'd probably call him a douche anyway. News Flash, buddy... Every time someone speaks the truth or shares a little about their background, they are automatically demonized by jealous spectators.
This guy has to be one of the most knowledgeable guys in the world over a huge variety of subjects. I wish I had 20% of the knowledge this guy has.
Very excellent and thorough explanation of the technical details. It makes your channel stand out above the rest.
Thanks!
I really like your use of metaphors, you did a very good job explaining this. "Enthusiastic outdoor activities" was my favorite. 😂🤘
Tech Ingredients, simply one of the best channels on CZcams. On this one, I found the physics of wave reinforcement and sweeping frequencies to form continuously variable peaks fascinating. The reverse shield to focus reflected LRAD emissions back to the source was also very cool!
Kudos!
Wow. Ive watched hundred of videos about sound and speakers, and thats the best explanation of how a transducer works ive heard. Great video
Thanks!
I'm not even a hobbyist, but I like to understand what people are talking about, and I like to understand things like this. I appreciated very much the impedance matching description, totally get it. I also really liked the illustration of constructive and destructive interference of sound waves. I had a gentleman probably 20 years ago draw a very similar diagram explaining to me how noise cancellation worked. It was brand new back then.
if i ever need a LRAD System I'll just play this at full volume
Thank you so much for making physics understandable and even fun! Sonics and acoustics are of interest to me as a musician. I just did an experiment where I found that playing a sine wave at 1000 Hz was different than a chirp from 400 Hz to 2000 Hz. I noticed it was louder towards the high end. In fact, to me here, 1900 Hz is louder than 2000 Hz, by a noticeable amount. I haven't liked learning this much since I discovered the work of Julius Sumner Miller.
I have been subscribed for a while now. Most people don't understand a word you say. I feel intelligent due to the fact That I understand what your saying. Thank you for the information and for blowing Kids minds. They think they can throw 2--15"s with a big amp in there truck and bump forever. This is science not BS!! thank you for the work your doing.
This channel is my youtube discovery of 2022. Thank you. Excellent job at explaining things.
Thanks!
I can't imagine how much your neighbors love you man :D Chirp Chirp :)
Loud Repulsive Annoyance Device?
@AII Iives Matter MalcolmX was right about liberals perhaps your wife is an LRAD?
My neighbor's hot rodded truck? It's extremely loud and annoying.
AOC?
@@Robb403 Car Alarm Wars..
The r stands for repetitive hahaha
Great content! The crisp explanation on the concepts are a joy to listen to.
Thanks!
Wow. I learned a great deal from this. Thanks for the providing good examples and clear explanations of various component values.
This is a great learning channel..
The next thing i would love to learn more about is directional sound beaming...using ultra sound.
+1
YES
Me 3!
Yeah, a directional LRAD system
Yes, directional ultrasonic LRAD!
Audio engineer here, your explanation of phase was better than any school lessons I've received. thank you
I do not believe anyone could have explained this better. Thank you
Thank you. The content you make helps to keep me sane.
That's gotta be the biggest "RIP headphone users" I've ever experienced.
In fairness, the video did warn us. I watched this with headphones, and turned the volume down.
@@SolarWebsite Yeah I was just listening, so no warning for me lol
its the first time i got a loudness warning and i actually had to turn down the volume lol
It wasn't as bad as some of the earlier ones in which you had to try to simultaneously listen The Presenter talk for long periods of time! This was much more humane I would say.
Welcome to 2020, where a video explaining sound pressure intersections can make you the happiest you've been all day.
idk if thats a good or bad thing. Sounds like you think its good, but to me that sounds like a sign that out attitudes and perceptions of life have become ill.
@@GodofLovers no, definitely a bad thing. The entire world seems to be going to shit, everyone hates each other and our evil media perpetuates it. You have people losing their livelihood and rightfully angry about it and others telling them to just stay home and trust the very government that only makes things worse when they try to "fix" things. Getting excited about science is a good thing, but it's sad when that happens to be the highlight of your day.
I love your work sir. Been subscribed since AvE recommended the channel, and loved every video.
Thanks!
Every time I watch a video of yours I learn so much 🙌🏾
Great!
Love your videos! They are oddly relaxing as much as they are entertaining and educational. Keep it up!!
Tune in next month for short range non lethal skin burning area denial transducers running at 90 Thz
95 GHz not THz iirc, but yeah that was my 1st thought lol. Maybe a collab with thesignalpath :)
Just DO NOT use 60 GHz.
@@msmeyersmd8 One of the 5G freq's?
@@msmeyersmd8 Yeah covid is bad enough as it is
@@msmeyersmd8 ?
Sir each time I have watched your videos iv noticed that you have the most amazing ability to explain really complex ideas in the most simple of ways, this clearly a testament to your in-depth understanding of all these ideas and technologies. Being able to teach is a rare skill that you make seem so easy. Honestly amazing channel !
Thanks!
Very technical
Very specific
Gets into details
I love it!
Not like other videos that say "I don't know, it just works"
Great vid, info packed, easy to understand.
Can't wait for the ultimate automobile security system... brown noise!
"What seems to be the problem officer!?"
Excellent explanation of sound properties and speakers. LRAD started in the same building with the company I was working for in early 2000 in San Diego. We were developing sonar systems for Navy and they were developing speaker systems when they came upon the technology which I believe was developed by either a college professor or a small company. There were other players developing the technology but LRAD obviously did a better job of marketing their technology.
You really don't have to prove anything. You speak in terms that can be understood by most people. I appreciate it greatly!!!!
This channel is amazing. Thank you so much.
I sense a great disturbance, as if a million audiologists cried out at once.
Thank you Obby Won!
This is fascinating. I thought LRAD was this extremely complex system with computers and special materials. This reminds me of an "ultrasonic gun" my father built with a very small horn speaker a little transistor amplifier, and a high-frequency oscillator. He mounted all of it in a plastic pitcher, like you'd use for juice or lemonade, but with a lid. He mounted the horn to the lid, attached the circuitry to plastic rails he glued into it, added what at the time was a large power pack with C-cell batteries, and filled the rest of the empty space in the thing with insulation to damp the sound coming back at the user. The frequency was pretty high -- I could just hear the bottom edge of it, but all he perceived from it was a beam of pain. It worked like gangbusters on stray or feral dogs, some of which ran in small packs in our neighborhood. He'd wave this thing at them and they'd run the other way, howling.
About 15-18 years ago, a guy invented a device that would "beam" sound into your head. You'd hear it, but a person right next to you wouldn't. It was designed for focused communication -- the inventor's example was a "shelf talker" device in a supermarket or department store, that would emit a beam of sound that generally would not be heard, but if you intersected it, a short message about that particular product was "spoken" into your head. There was some other talk about it, and I wish I could remember the name of the company the guy started. I was tempted to put some money into stock from that company for my 401K, but I'm not very knowledgeable about stocks, so I dithered on the subject. By the time I'd decided to do it, the company had pretty much vanished, POOF! Turns out they were acquired by a government contractor with military contracts through the DoD under DARPA. A few years later, LRAD popped up on the radar.
Seeing that these devices aren't terribly complicated or expensive, I'm seriously considering mounting a couple on my house's roof, to keep unwanted visitors in large groups from getting too close to my house. It would also give me the ability to talk to them without using phones to call or text back and forth. Add some hefty stepper motors and a gear train, and you could aim the thing remotely. Add a goodly-sized LiFePO4 battery pack, a BMS and a small solar panel, and it could easily operate even if power was cut.
Per the Non-Aggression Principle, it would of course only be deployed where violence had already been offered, to defend against such violence. I like the idea of being able to back up a request that such persons leave my property with an effective deterrent.
thats what this brought to mind for me. I thought about the sound beamer
this is amazing very clear straight forward info on how speakers work
Amazing explanation of phasing. Thank you.
My tinnitus really enjoyed this video.
I know your pain.
Same here...but i was waiting for the right moment to lower the volume....
@@revoxjazz8317 I knew the next 4-6 days were going to be fun when the video ended and the high pitch scream did not lol.
@@CriticoolHit ... nothing that a stage sound technician is not used to ... but really, there are things that Covid-19 has somehow alleviated the suffering, eh, eh, eh .... I say, playing with serious things!
@@revoxjazz8317 shit I had tinnitus for my whole life and hate high frequency tones. It make it ear piercing
The irony is I've been wanting one of these. Figured it would be good for defending against predators during camping by having it mounted to a truck. Seems cleaner and more efficient than alternatives. Plus it can scream for help if needed.
Just use a gun bro
I'm going to replicate the device you made. Some time back I looked into how LRAD worked but I could not find much about it. Thanks for explaining it. I love your videos.
This contains the best explanation of electrical impedance I have ever heard. This bloke is a legend ! Thanks so much.
Sure!
Just thanks for all that nice content! Carry on! And I really love that you folks always tell about the price of stuff. Some youtube channels play with insanely expensive stuff, but get sponsored. So it's really great to know, those things are affordable too.
Sure.
As I've said before engineering is the art of compromise and if you don't know the numbers, you don't know anything.
Cost matters...
What if the protestor bring this and use it on the riot police 🤔
That would be the ideal scenario
I really love your stuff. you explain some complex concepts in ways that are easily understood.
Thanks!
I love content of this channel....And just watching and listening to expertise of this man is a youtube time well spent🙏👍
Truly a man of our time, also still waiting for your vid on the rifle resistant plate.
Addendum: have fun LRADing people.
Are you referring to the plastic plates that were sent out by the hundreds in the 50s-60's with the note reading " Please destroy me" (or something to that effect) as part of a marketing stunt to show off the Co's super tought plastic? My late father used to tell us stories of said event, but I've never been able to hunt down the company. :(
@@Killianwsh nope, last year TI had a video about cheap ultrahard ceramics and epoxies he was going to make into custom body armor to stop rifle rounds.
@@rre9121 Ah . I must have missed that one , I shall have to go back and find it. On the same note, Dr. Robert Murray-Smith also created a Graphene enhanced bio- plastic that held up to .223 & 7.62 impacts in very thin plates if you're interested.
@@Killianwsh Isn't murray smith a kook, though? Hard to tell because he usually leaves out a lot of detail. But I thought he was a kook.
@@mckenziekeith7434 No, Dr. Murray- Smith not a kook. lol Quirky, yes, but not a kook. :) He may seem brief on some topics in recent videos, but that is only because he's covered those portions of the topic at considerable length in prior videos. (often step by step & utilizing various methodologies, describing the pros and cons of each method as he goes.) He's been making videos covering many different areas of scientific interest for quite a few years. He's considered ,by many, to be a prominent authority on graphene and graphetized carbons & has quite an impressive list of academic and professional credentials. (He's just very down to earth & doesn't like to brag about his accomplishments, but they are certainly there and verifiable , should one care to check.) If you appreciate Tech Ingredient's ch. I'm sure you'll find some of Rob's work interesting. They have different presentation styles and personalities, but they are both brilliant in their own ways! Hope this helps.
K.
This is a great video! I will say though, anything made by Orion is great gear. Their HCCA subwoofer drivers are legendary. :)
I'm impressed with your knowledge and your project quality.
Love the videos, thanks for uploading!
Love it! Please do the holosonic/audio spotlight next! The ultrasonic directional sound that turns into audible sound by the time/when it hits your ears.
How does that work? Is it inner ear inter-modulation? I.e. it relies on the distortion generated by the ear itself to produce audible sound?
@@Audio_Simon en.wikipedia.org/wiki/Sound_from_ultrasound
This is what I too was hoping for
I've wondered about the health effects of ultra sonic frequencies at very high SPL. Is there research thay suggests it's okay? We don't sense xray or pure UV but they can be damaging.
@jdh7803 Can you provide some reference for this sonic weapon? It seems unlikely to me, because helicopter blades produce a very strong low frequency signal about 6hz. People do not die, although some buildings have structural failure.
I've a feeling you'd dominate a subwoofer competition!
Awesome content from a great channel. This is what is making CZcams great again.
Always wonderfully informative
31:35 wow! high intensity sound spikes slicing through the air to try and catch you in a standing wave that stabs at your ear drums!?!?
It'd be interesting to make an interference map with a depth camera and remote mic. Then you could make one for each frequency and have a computer calculate the best frequency based on the person position relative to the LRAD. Then move to multiple targets with oscillating frequencies. Might be a good collaboration with Stuff Made Here.
I have been in the Science of Sound since 1987, and I have to say, this channel really speaks to me. I wish this had been around back then, because I still enjoy listening to educational information on sound, even if it is a refresher... one must keep sharp.
Thanks for the video. I appreciate high information density of your videos.