Best LRAD System!... For Your Money

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...
Graphs:
drive.google.c...
Find us on Patreon and our website:
/ techingredients
www.techingred...

[@Taskorilla]

You're like that cool older friend trying to teach everybody cool shit. The world needs more of you. Thank you brother.

[@BobbyJHeupel]

“Enthusiastic outdoors activities.” I absolutely love this channel.

[@SolarWebsite]

The absolutely dead pan delivery of "enthusiastic outdoor activities" had me laughing out loud. :-D

[@jdrew9349]

You beat me to this comment. Haha

[@lordjaashin]

dude is a genius and with a wicked sense of humor

[@ulfpe]

Avoiding demonetization... and not getting involved

[@lordjaashin]

@@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

[@Convolutedtubules]

It gets me every time.

[@crazyd3uces]

Why do I get the vibe this guy was part of the Manhattan project

[@TechIngredients]

Did you watch our video on hydrogen detonation?

[@yoxat1]

Funny

[@danhiebert9904]

Whats next home version of the Philadelphia experiment?

[@einarabelc5]

@@TechIngredients Classic!!

[@omegalamda3145]

He teaches with the Feynman style, simplifies clearly w/out arrogance all while he is just as curious as we who watch his Chan

[@Artsificial]

"Enthusiastic Outdoor Activities" - that's a euphemism if I ever saw one.

[@comandantegorrion7271]

Why, whatever could you be talking about, friend?

[@justinwbohner]

Burn, Loot, Murder?

[@nedj10]

@@justinwbohner Now Now don't talk about Law Enforcement like that :) Qualified Immunity is a myth right?

[@agaddy]

I'm unapologetically stealing the term. I've been looking for a snarky way to replace "Mostly Peaceful.

[@gesamtkuntswreck]

Acab

[@ThumperLV]

The first time I ever heard why cone woofers and horn tweeters exist. Thank you!

[@rickychen9963]

Same here, very clear explanation

[@skipfred]

That's one of my favorite things about this channel. You come for the x but learn about x, y, and z.

[@parthmalani6286]

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.

[@WaylanEE]

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.

[@jakesmith2341]

I highly suspect that he teaches at MIT

[@jakesmith2341]

I think I ran into him at happy hour oyster night out in the countryside while I was going to Boston U.

[@tubamacmac]

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.

[@TechIngredients]

Great, welcome!

[@b52productions]

You should see his laser builds 😉

[@thismanrocks7217]

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.👍🏼👍🏼👍🏼

[@ejpn]

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"

[@rohitkhanna]

LoL

[@uppitywhiteman6797]

HUH?

[@4.0.4]

"You gotta admit: size does matter" - Tech Ingredients, in a confident tone.

[@kiyoponnn]

big pp energy

[@jannikheidemann3805]

This comment deserved it's 69th like!

[@getmeoutofsanfrancisco9917]

@@jannikheidemann3805 Whoever voted after 69 needs to be hung. The bad kind.

[@kiyoponnn]

@RenaissanceRepairman Oof that sucks

[@D-One]

"Ready?" Me: Yes! ...... I was not ready.

[@zcalex7660]

Im bleeding from my ears

[@jandastroy]

Ready to deafen everyone within a 10m cone

[@saccaed]

Kinda half expected the THX sound

[@78tag]

@@saccaed ...as soon as I saw him reaching for the switch I had the volume done to about 10%

[@jtjames79]

@@saccaed The Tiny Tunes version was the best. "THE AUDIENCE IS NOW DEAF!"

[@joeflosion]

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!

[@RyanSmithElectroseed]

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.

[@WarpedYT]

Human Test Subjects!!!! oh yeah... Subscribed!

[@Rīñrnp]

Same :))

[@gloriabryan1931]

Not very funny when I am a human under attack

[@carlspackler9550]

Im there brotha! I gots to know.

[@DeDandy]

Great comment with good videos...oh yeah subscribed No seriously your channels looks pretty cool

[@krosskaien8618]

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.

[@skasev]

Was it the killer bees?

[@FVBmovies]

As one smart man put it: If you can't explain it simple, you don't understand it enough.

[@kiyoponnn]

It's not that you're bad at physics, it was probably because information wasn't presented to you in a clear way before

[@fordfiveohh]

@@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...

[@kiyoponnn]

@@fordfiveohh Are you're referring to this? en.m.wikipedia.org/wiki/Intellectual_disability I was speaking about the general population

[@Black15Shadow]

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.

[@TechIngredients]

You're welcome.

[@billwright5036]

As always... excellent!

[@bushratbeachbum]

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!

[@s28400]

"Because of all of the enthusiastic outdoor activities that are occurring in our major cities"

[@robertredbeard1855]

I will make and use one of these. Burners, Looters, Murderers BEWARE.

[@vid2ification]

@@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...

[@chudleyflusher748]

Yes!! Especially DC and the Capitol. What a bunch of traitors!!

[@1badman734]

@@vid2ification Right. Stop feeding them, and they'll eat each other.

[@MansInhumanity2Man]

@@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.

[@quintyoung]

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.

[@JennyEverywhere]

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.

[@Yarkoonian]

thats what this brought to mind for me. I thought about the sound beamer

[@android61242]

I can't say that I need an LRAD system but I can't wait to watch this one.

[@and7barton]

I don't need one either, but I WANT one. I'll abandon my giant organ-pipe project and built this instead.

[@supergeek1418]

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?

[@Dev_Everything]

Thank you for this video. I am building one for my neighbors that like to party until 5am.

[@imho2278]

Mine go till 2.30. But the subwoofer is the real enemy.

[@WD-zk6fg]

So did you build one?

[@curiosity_saved_the_cat]

Just the sight of the Tech Ingredients logo in the KZbin notifications makes me happy. Nice project, as always!

[@jondowd11]

Welcome to 2020, where a video explaining sound pressure intersections can make you the happiest you've been all day.

[@GodofLovers]

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.

[@jondowd11]

@@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.

[@jmac430]

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

[@PedroHenriqueKopper]

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 :)

[@bernardo00124719]

that guy is clearly on another level. U cant study yourself into a fucking genius

[@PedroHenriqueKopper]

@@bernardo00124719 How do you think he got there? By studying, man!

[@bernardo00124719]

@@PedroHenriqueKopper naw. he is like a sponge near water. knowledge just pours into him.

[@thomastoews7850]

@@bernardo00124719 you make yourself susceptible to the knowledge. It's a practice to learn. Let him take credit for his knowledge.

[@RocketPunchHero1]

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.

[@fourdeadinohio8303]

if i ever need a LRAD System I'll just play this at full volume

[@yourcurtainsareugly]

Remember, hearing loss is cumulative and permanent!

[@Questchaun]

What?

[@lseul8812]

What?

[@pyromen321]

Mawp. Mawp.

[@wobblysauce]

zzzzzzzzzzzzzzz

[@JulianHaardt]

I can't hear you! Can you please speak louder?

[@Sodasneak1]

Audio engineer here, your explanation of phase was better than any school lessons I've received. thank you

[@ScoocumAF]

Just found your channel. Very good! Excellent job with conveying the technical explanation without overwhelming those of us without a PhD in physics!

[@randallee3544]

This is a great learning channel.. The next thing i would love to learn more about is directional sound beaming...using ultra sound.

[@zyklone19921992]

+1

[@mcdoctorglock]

YES

[@Killianwsh]

Me 3!

[@AlexandreMachado0]

Yeah, a directional LRAD system

[@USFmarine]

Yes, directional ultrasonic LRAD!

[@maxor1986]

The quality of these videos is simply amazing! Thank you SO much for doing it!

[@madsnoop7]

Nothing less from a True American Gentleman of the 20th & 21st century . Love to chat with him one day .

[@AndrewBahls]

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.

[@loganb.768]

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.

[@kashmirha]

I can't imagine how much your neighbors love you man :D Chirp Chirp :)

[@TheRoseOfGremory]

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.

[@dogeenjoyer7581]

Just use a gun bro

[@planesimple8514]

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!

[@BillyNoMates1974]

Tune in next month for short range non lethal skin burning area denial transducers running at 90 Thz

[@anullhandle]

95 GHz not THz iirc, but yeah that was my 1st thought lol. Maybe a collab with thesignalpath :)

[@msmeyersmd8]

Just DO NOT use 60 GHz.

[@Captaink-1]

@@msmeyersmd8 One of the 5G freq's?

[@tiftik]

@@msmeyersmd8 Yeah covid is bad enough as it is

[@nicoleyensen7062]

@@msmeyersmd8 ?

[@keiththaxton2385]

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!!!

[@TechIngredients]

Thanks! I never actually denied anything. Watch that video again and you might figure it out.

[@Shiftypop]

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.

[@waynebreivogel1742]

Tech Ingredients, simply one of the best channels on KZbin. 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!

[@Picklemedia]

I really like your use of metaphors, you did a very good job explaining this. "Enthusiastic outdoor activities" was my favorite. 😂🤘

[@danielwe2517]

After watching this vid (or any other of yours) I'm feeling like a professor now. Great Explanations!

[@TwstedTV]

I keep saying it. this guy must be a really cool dad. I hope his son is learning a lot from him. Not many fathers out there that are as smart as this man. :) One thing I would love to see is a video about sonar, like what submarines use. How its used, why and also a home DIY version of it :)

[@brianlopez8855]

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.

[@LazerLord10]

Loud Repulsive Annoyance Device?

[@WoLpH]

@AII Iives Matter MalcolmX was right about liberals perhaps your wife is an LRAD?

[@Robb403]

My neighbor's hot rodded truck? It's extremely loud and annoying.

[@Trialnerror]

AOC?

[@PicaDelphon]

@@Robb403 Car Alarm Wars..

[@a-yates]

The r stands for repetitive hahaha

[@CriticoolHit]

My tinnitus really enjoyed this video.

[@Mr_Wh1]

I know your pain.

[@revoxjazz8317]

Same here...but i was waiting for the right moment to lower the volume....

[@CriticoolHit]

@@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.

[@revoxjazz8317]

@@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!

[@thatyoutubeguy7583]

@@revoxjazz8317 shit I had tinnitus for my whole life and hate high frequency tones. It make it ear piercing

[@Sauspreme]

That's gotta be the biggest "RIP headphone users" I've ever experienced.

[@SolarWebsite]

In fairness, the video did warn us. I watched this with headphones, and turned the volume down.

[@Sauspreme]

@@SolarWebsite Yeah I was just listening, so no warning for me lol

[@josephgauthier5018]

its the first time i got a loudness warning and i actually had to turn down the volume lol

[@ristomatti]

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.

[@PiezoSourceInc]

Thank you for the LRAD explanation. My company makes piezoelectric speakers (formerly Motorola/CTS product line) used in array applications.

[@Nontacticalboy]

As a sound engineer, this brought me back to my class decades ago. Its interesting to me as I'm aware of LRAD briefly, never knew its horn inside.

[@JohannVictorJC]

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.

[@matthewmoore2839]

I sense a great disturbance, as if a million audiologists cried out at once.

[@josephpadula2283]

Thank you Obby Won!

[@guitarbrad]

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.

[@rypedub7973]

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 !

[@teaganwindago3132]

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.

[@rre9121]

Truly a man of our time, also still waiting for your vid on the rifle resistant plate. Addendum: have fun LRADing people.

[@Killianwsh]

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. :(

[@rre9121]

@@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.

[@Killianwsh]

@@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.

[@mckenziekeith7434]

@@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.

[@Killianwsh]

@@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.

[@Munden]

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.

[@Audio_Simon]

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?

[@Munden]

@@Audio_Simon en.wikipedia.org/wiki/Sound_from_ultrasound

[@Codeaholic1]

This is what I too was hoping for

[@Audio_Simon]

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.

[@Audio_Simon]

@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.

[@Errr717]

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.

[@JT-si6bl]

Utterly priceless education from the roots all the way to the blossoms. Epic generosity and enthusiasm!

[@patricknoyes4305]

One minor note about phased arrays and why you wouldn't want one for an LRAD is that when you try to steer a beam off of the normal to the plane, you get an angular dependence. Since the LRAD uses a chirp, this would result in a sweep of the beam if you tried to steer it electronically. This is my favorite youtube channel and by far the most informative/educational. Thank you for all of your effort.

[@TechIngredients]

Correct.

[@Syltibob]

We who have tinnitus... Sounds like a normal Wednesday. 😜

[@Stoneman06660]

Testify!

[@jimbo5635]

You was in Army also?

[@livinonlimiter]

My ears are singing away right now

[@defaultdriftco00]

Right?!

[@supergeek1418]

@@jimbo5635 Or a gunner's mate in the Navy.

[@TioDave]

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.

[@Holey_Moley]

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!?!?

[@kuzadupa185]

You know what I love most about you and your channel. The no b.s. you were one of the few channels who didn't blend in with the sheep and wear a face mask when taping a video. Keep up the authenticity!

[@jameski5oeb668]

In 1990 I put together a Kicker sub with two upward firing 2x6 cone tweeters and didn’t understand why they would drive me out of the cab of my pick up truck. They were so loud that I eventually put socks in the to calm them down. I didn’t understand that audio lesson until I watched your video. I used crossovers and everything. Now I know. Thank you!

[@TechIngredients]

No problem, you're welcome!

[@hightechredneck8587]

When you spoke about Amps, Ohms, and Voltages, I started getting flashbacks to physics class in High School. Then my buddies and I rewiring our car sound systems to make them more powerful. Our teachers both loved and hated us.

[@CKexploresNYC]

What if the protestor bring this and use it on the riot police 🤔

[@eonoire]

That would be the ideal scenario

[@JayBe443]

Youd be distrupting their work and be going to jail soon after is my guess

[@Thebb123]

If a citizen uses it, it’s a felony if police use it it’s necessary force

[@AnonymousAnarchist2]

​@@JayBe443Yup. However there is an very very real arument that can be made in court for thier "work" being applied outside of thier job description, and in the US at least, against the consitution. Its very situational. But it is very universally the local governers job to address the protesters, not the polices. So rule of thumb is generally If ya did it to stop actual harm being done; you will likely get out without charges... so long as you did not commit arson, get someone unalived, or do so with malicious intent. But you might have to wait for politics to return if authoritarianism has taken over, such as weve seen happen in many US states. I wont go into poltics any further, then a base description of Authoritarianism Any attempt to control culture is Authoritarian. Any attempt to control what people do to thier bodies themselves is Authoritarian. Any attempt to remove, or reduce the rights of people, or reduce public opinion of people based on any status they where born into including where they are born; is authoritarian. Attempts to stop people from doing something TO someone else are NOT authoritarian. This does include nixing services based on vaccination status, or requiring masks. Thats stopping you from doing something too someone else. The US has always danced that line, but it has gotten scary in the past 8 years.

[@jtjames79]

I know where there's cheap property in Hawaii with lava tube access. Just in case you are in the market for a volcano lair.

[@dx3910]

Price per square foot? Asking for a friend...

[@msmeyersmd8]

Inactive lava tube, I hope? If it’s active, LRAD not needed.

[@firstmkb]

What is the resonant frequency of those lava tubes, like if you wanted to enforce privacy in YOUR hemisphere?

[@franklyanogre00000]

@@firstmkb Probably end up melting your evil lair when when your need to broadcast wicked bass lines trumps the integrity of the lava tubes. What a way to go though... I wanna die in flowing hot magma because I played "Bad Company" by Bad Company too loud. Epic.

[@Superabound2]

Cheap property in Hawaii?? Yeah right

[@billdomb]

Superb clarity of explanations with acoustic coupling.

[@frtard]

We just installed some ultrasonic sealing machines out on our factory floor. When they're active, you can literally _feel_ the sound like glass shards scraping across your skull and you can sense the diffraction patterns through the safety fences felt as ripples as you walk around.

[@gammalight1312]

I've a feeling you'd dominate a subwoofer competition!

[@ebol08]

3:34 Didn't know you were an MC back in the times'

[@thomshere]

What a great channel and an amazing inventor! Thank you so much for all your great videos and web site as well!

[@numberyellow]

"Enthusiastic Outdoor Activities" You have a way with words, sir. ::lifts glass:: May you never lose that gift.

[@jlinkels]

I have been building many speaker systems during the past 45 years. Applied (what I hope) proper design rules. But this is the first time I have seen a proper explanation of what actually impedance matching is for a driver. Most if not all technical articles copy the same phrases from other articles, apparently without a fundamental understanding by the author. Thank you.

[@TechIngredients]

Thanks!

[@TheFunnyoldman]

Thanks for keeping up the great content!

[@robfenwitch7403]

"Ohmage", an homage to Georg Ohm!

[@rty1955]

Actually ohmage is very technically correct. For example a resistor behaves quiet different from an incandescent light, or motor or transformer. Usually anything with a power factor of 1 is the same as a resistor.

[@JanicekTrnecka]

Ohm Sweet Ohm by Kraftwerk!

[@rty1955]

@@JanicekTrnecka"there's no place like Ohm"

[@rty1955]

@@JanicekTrnecka Ohm on the Range Sweet Ohm Alabama Haha

[@Bassotronics]

Resistance, ohmage, impedance. . I need a resistor resistant enough to resist this resistance.

[@kenreynolds1000]

“That should be a ball.” so dry, yet so funny. Making dangerous science cool again.

[@johnalexander2349]

"Well, you've got your rioters, who feel that life ain't fair, your cops, who are employed to keep the rioters in check, and then you've these four arseholes pointing an LRAD at both, just for shits and giggles."

[@gogo8965]

@@johnalexander2349 The 4 horsemen of sciency stuff

[@user-ng8nd5xi2b]

just for information a.k.a jfi: pingpong ball is table tennis ball 😄😄😄

[@mondy-chan]

hes gonna invent the brown note, i quarantee it

[@jannikheidemann3805]

Wait, there was a point at which dangerous science wasn't cool?

[@marcdraco2189]

I've said it before and I'll say it again, this is the cool dad every boy wishes he had and every dad wishes he could be.

[@DudeInWalmart]

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.

[@Acoustic_Theory]

Fun to try: If you take a line of closely spaced transducers and begin to curve that line around a central axis, with the speakers still facing forward, you will eventually make a ring of transducers. The transducers need to be small enough that their center spacing is 1/3 of a wavelength at the highest frequency to be reproduced. The ring diameter also needs to be larger than 1/2 wavelength at the lowest frequency to be reproduced. This structure will create the complex lobing behavior of a line array, but it will be created in both vertical and horizontal axes; the number of sources will create a complex enough interference pattern that lobing off axis will be greatly attenuated. Now, instead of the individual speakers, imagine that the ring becomes the diffraction slot of a constant directivity horn, with the horn flare after the diffraction slot bent around the axis of the whole structure. Then a single compression driver could be mounted near the center, with the horn expanding out through 360 degrees toward the slot. This would be a structure similar to the horn of the Federal Signal 508 siren. This would be a horn that could produce a very narrow pattern on-axis, with the off-axis energy being mostly attenuated by self-interference. The reason a diffraction slot would be used where the horn bends forward is because the horn would need to reproduce high frequencies as well, so the horn path would need to be kept narrow enough that high-frequency energy in the horn is not internally reflected or reduced by self-interference inside the horn path.

[@Tazmanian_Ninja]

That was deep thinking right there 😅 Thank you! And cool content you have on your channel. Will go through some of your videos.

[@ciddax754]

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.

[@TechIngredients]

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...

[@legendarysideburns2213]

Thanks for the info! Playing my music way too loud seemed like the most effective way to irritate my neighbors, but this blows that out of the water!

[@mixiekins]

On the flip side, I want one to deter mine which blast their music at 3am.

[@jeffreylyon9643]

You really don't have to prove anything. You speak in terms that can be understood by most people. I appreciate it greatly!!!!

[@pic9375]

I am an electronics technician, and in my younger days I used to build high power amplifiers (using MOSFETs). I also used t build speaker baffles, however this video has highlited many void points. Thanks!

[@dempa3]

Powerful stuff! One always learns a lot of new things on your channel! I left a couple suggestions for projects on the patreon page! One about a DIY Digital Micromirror Device laser projector (worlds best projector, in addition to the best speakers), and another about a DIY heat recovery ventilation system (a continuation of the climate control videos). It would be very interesting to know if you find these projects feasible/interesting. Many thanks for your great work!

[@berniebernhardt1898]

This is a great video! I will say though, anything made by Orion is great gear. Their HCCA subwoofer drivers are legendary. :)

[@randomstranger1188]

17:26 Have you considered 3D printing the folded horns, And then placing the sound producing parts inside? Having a 3D printer would probably be beneficial to you in more ways than one. I am sure you could come up with all kinds of uses for a plastic modeling system.

[@brendanquinn6894]

This contains the best explanation of electrical impedance I have ever heard. This bloke is a legend ! Thanks so much.

[@TechIngredients]

Sure!

[@bal20]

Wow. Ive watched hundred of videos about sound and speakers, and thats the best explanation of how a transducer works ive heard. Great video

[@TechIngredients]

Thanks!

[@anchorbait6662]

I lost my headphones so I listened to this video with my LRAD system :p

[@thatjokerperson7062]

he just straight up mentioned the rioters, showed us how to hook it up to our vehicles, and how to operate it OwO

[@Jcewazhere]

Or he showed the protesters how to fight back against the oppression. Who needs a DIY LRAD more: The over-funded cops or the people standing against their tyranny?

[@GoetheNorris]

"Enthusiastic Outdoor Activities"

[@Jcewazhere]

Like these: kzbin.info/www/bejne/iHzKqoKFip2gpcU

[@BryanTorok]

@@Jcewazhere Here I thought you had a link to rioting and looting. Instead it is just more liberal blathering about mainstream media induced hysteria. If you tell people they are a victim often enough they will believe you. Then when they engage in criminal behavior they will fight and resist the police.

[@ReallyRyan.]

@@BryanTorok You're a closed minded moron. It isn't the media that made rioting ensue nor were the people that were victims within it any less victims. Conservative media outlets are trying to downplay the significance of the protests as a police issue and are trying to politicize them because they all have a political agenda and are only trying to fear monger, desensitize and divide people, so that gullible idiots like you vote for them out of fear and not with your head like a good little sheep. The Republican politicians are only out for the rich and the wealthy and are only interested in maintaining power through any means necessary, even if it means turning America into a fascist regime. It's all happening right now, plain as day. All you have to do is open your eyes and look at their actions, you can see it easily.

[@mikeworkman3593]

@@ReallyRyan. So take everything you said, and reverse it, then you will be correct. Only democrats take donations from corporate America. The left are fascists. The left created the KKK and slavery. Not one republican ever owned a slave. Dems keep people on modern plantations in urban blight, they keep them on welfare so they are dependent, this is how they buy their votes. BLM is a racist hate group, that was only made to steal millions of dollars from corps. There is no systemic racism, twice as many whit people are shot by cops each year, but they aren't in the news(media lies/fake news). Every person that has been the news wouldn't have been shot if they didn't resist arrest.

[@BryanTorok]

​@@ReallyRyan. We have 180 degree opposite viewpoints. I've spent a great deal of time looking at things from many viewpoints, including yours. I come from the perspective that the USA is an exceptional country which has brought more freedom, opportunity, and prosperity to more people than any other country. Yes, we weren't and aren't perfect. Nothing done by humans is perfect, but we grow and improve. Very credible, independent studies done by a variety of sources have concluded that there is NOT a high rate of police misconduct. In 9 out of 10 controversial incidents where there was a rush to judgement, ultimately after thorough investigation the officer(s) were cleared. Obama stoked the flames of racial division by rushing to condemn police and never once apologized when he was wrong. Recently, Biden repeated the lie about Michael Brown (Hands up, don’t shoot) from Ferguson, MO. Biden apparently forgot (or just doesn’t care) that the Obama/Biden DOJ concluded that the officer was justified in shooting, Hands Up was a lie, and that the incident was not racially motivated. Yet, he repeated the lie for political purpose. www.justice.gov/sites/default/files/opa/press-releases/attachments/2015/03/04/doj_report_on_shooting_of_michael_brown_1.pdf Trump has repeatedly reached across the aisle to work, negotiate, or compromise with the other side, and been rebuffed by Pelosi & Schumer who lie and spin and refuse to give Trump any small victory even if hurts their own cause and people. The latest is the COVID relief packages. If they can't get everything they want, they turn down everything and blame Trump. If you think Trump is a racist, you should watch this video. www.c-span.org/video/?c4902129/user-clip-herschel-walker There are many Black people who have made similar testaments. BLM and Antifa are both Marxist organizations with the great goals of creating chaos and implementing a socialist/communist regime like the failed governments of Venezuela and Cuba. You don't see masses of people walking thousands of miles or getting into small boats to flee the USA and go there. Here is a gentleman who tell the story of his family fleeing the Spanish socialist revolution and later the rise of Castro in Cuba. www.c-span.org/video/?c4901970/user-clip-important-speaker-rnc BLM and Antifa are, in fact, the fascists, rioting, looting, burning, and attacking innocent people. There are lots of videos to support this. Heck, there was a group that was live streaming from Portland and Seattle. One could see it live and unfiltered. It is you that needs to open your eyes and climb out of your ideology.

[@joetheman74]

Back in the 90's I had two Orion 12 inch sub woofers with Kevlar speaker cones hooked up to a Sherwood amp running at 500 watts RMS per channel into a custom sealed enclosure. All this was mounted in the back of my Dodge Shadow with the back deck plate removed and up firing to reflect off the back window. You could hear me coming before you would see me. Ahh the memories, and the hearing loss I'm stuck with today! Orion made some amazing high quality stuff back then. Their Gold series amps were expensive and very high quality back then too. I had forgotten all about them until now.

[@CourtneyRodkin]

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 !

[@TechIngredients]

Thanks!

[@Cautionary_Tale_Harris]

Oh wow when the fine thoughful drivers with their incredibly loud sound systems want to graciously share their thumping bass with me, I can return the favor with this!

[@ReinoGoo]

Beethoven or Wagner?

[@Cautionary_Tale_Harris]

@@ReinoGoo Why not both?

[@rre9121]

@@Cautionary_Tale_Harris at the same time.

[@Cautionary_Tale_Harris]

@@rre9121 I like your style.

[@JosephHarner]

In the race to become the biggest asshole on the road, we have introduced a policy of MAD, or Mutual Acoustic Destruction.

[@macledou]

I need this for when next door has their absurdly loud parties

[@imho2278]

I don't think it'd penetrate the walls. But a 70Hz one would rattle their cage...

[@salmonline]

Excellent. Now protesters can build their own and bring it with them to combat Stormtrooper tactics. Thank you Tech Ingredients.

[@salmonline]

@Adam Dee We'll see, trumptrash.👌😉

[@marktackman2886]

I woke up this morning and found this, I need practice on volts/watts/amps/ohms, keep teaching us.

[@TonySeliquini]

Love it! You are one helluva communicator! My kid used to love her science classes -- then she moved on to a teacher who hardly involved the class in labs, and she grew weary of science. Fortunately, I am a bit of a mad scientist myself, and love to run my own experiments, and I think, slowly but surely, she's starting to rediscover the wonder of the physical world we live in!

[@TechIngredients]

Good! I think the future of education is not in the institutions that have traditionally been the primary source. With the growth of the network society we'll see more and more connection between students and innovative, appealing and effective teaching.

[@TonySeliquini]

@@TechIngredients Yes sir! And at the expense of sounding like a sycophant, (I prefer psychopath myself--I kid!) channels like Tech Ingredients are pioneering that effort. Cheers!