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How do you fix a problem you can't even

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see? In smaller systems, it's not that hard. Air leak on your tire, just throw

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some soapy water on it and find the bubbles. Easy. But in a larger system,

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like our workshop's compressed air hoses, it could take a fluke to find a

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tiny leak somewhere. A Fluke II 915

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acoustic imager, to be exact. This

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$25,000 handheld camera does not work like a

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normal camera. You know, taking in light and transforming it into internet cloud.

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Instead, it takes in sound and uses it

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to find leaks and equipment malfunctions, even detecting noises

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beyond the range of human hearing. It then represents that audio like a heat

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map. So, let's see if we can use it to find some really useful stuff like the

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leak in our system and maybe even a segue to our sponsor.

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Shut your trap, computer man. It's okay. I got this. Look at me. You're thinking

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I need more action in my life. And I agree. Bam. Look at that. Thousands of

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planes, choppers, tanks, and ships on our gently used War Thunder vehicles

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lot. Trust me, you're going to click the link below and try War Thunder, and

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you're going to like it. Ask me how I know. Later though, I'm busy.

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Like so many of our videos, this one was prompted by an actual problems

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that obviously it helps a little that we shoot most of our workshop videos on the

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other side of this wall, but it's still been a major source of disruptions over

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the last few years. Now, an obvious solution would be to just not have a

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compressed air system, but that's not really an option. We use it for

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everything from cleaning things off to

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cutting and polishing to hacking things apart. Excuse me. And I've done a fair

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bit of sand blasting with it, too. Mostly for my personal motorbike

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project. So, okay, we need an air compressor. Deal with it, right? Well,

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see, it wouldn't be that big of a problem. Except that somewhere in the

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system is a leak. So, the compressor goes off way more often, disrupting us

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way more often than it needs to. That's where Fluke's acoustic imager comes in.

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Theoretically, with this, in a matter of minutes, I should be able to track down

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the leak, saving us both time and money. Theoretically, I'm going to put that to

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the test. I've never actually used this before, so I don't know how I'm going to tell the difference between our HVAC

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system and air leaking out of a hose, but presumably, it's pretty easy. Wow,

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there's something in this wall. Oh, there's something bouncing off this

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wall. I think >> you'll get a lot of sounds reflecting

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from that. Sometimes >> that makes sense. >> Keep an eye on the right side and you'll

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see the range of frequency band that it's looking for.

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>> Okay, I feel like I could move pretty quickly at this point. Oh, hello,

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Captain. I think we've found something

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right there. Okay, but would I even be able to hear this? Oh, I can. I would

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have to be within like 10 inches of it though. One to go. And that took like

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two minutes.

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Oh jeez. Okay. Once you know what you're looking for, it stands out like a

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beacon. Oh yeah, this one's a lot more obvious.

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So between these two, this one was a pretty substantial one. We found both of

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them within just a couple minutes. >> This is a lot like the video Adam Savage

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did with this thing. Okay, two cool people can have the same cool idea at

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the same time. Adam Savage and Electroboom and also me, just slower. I

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want to show you guys separate from the video mode, you can put it in leak Q

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mode. This allows you to take a picture

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of a leak. Then according to your settings, so gas price, compression,

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energy cost, as well as your currency, it will tell you how much that leak is

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going to cost you here. I had no idea

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that just a little air leak could cost $45 a year. So, replacing the fitting is

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a no-brainer. That assumes it's running all year. I mean, it is running all

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year. We never turn it off. Like, that's the whole thing with a leak. It's like a

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faucet, right? Like a every once in a while drip will waste like more gallons

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in a month than you could possibly fathom. Now, obviously, if the only

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gases you're working with are compressed air, it would take a little while for an

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investment like this to pay for itself. But in certain industries, this could be

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worth its weight in gold in cost savings. Now, while the workshop team

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gets those fittings sorted out, I'm going to go see what else this thing can do. The magic of this device is really

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in its algorithm and precise calibration. The hardware itself is

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pretty simple. This array of 64 microphones is arranged in a logarithmic

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spiral to capture sound, and it uses beam forming to determine the source of

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the sound. Then it overlays that on the camera image as what Fluke calls a sound

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map. In the default mode, a sound map looks an awful lot like a heat map. All

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of this is possible because the microphones are all in known locations

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relative to both each other as well as to the camera right in the center. So

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sound hits the array and with a little bit of maths, the source can be

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determined by analyzing the reception delays. There are some limitations

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though. Its microphones pick up sound between 2 kHz and 100 kHz, which is well

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above the range of human hearing. So if you wanted to find something like a

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small liquid leak, say in our water cooling loop here, the frequency of a of

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a drip drip drip might actually be too low for the fluke to pick up.

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Fortunately, we have an idea for that. Why not turn our liquid leak into

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an air leak? All we need to do is pressurize our loop.

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Well, that was easy. Oh, you put a hole in the tube. Usually the leaks are a lot

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smaller than that in these water cooling systems. I kind of want to know if it

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can handle a much smaller leak, like uh an, you know, an O-ring issue or

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something. Every once in a while, especially on hardline fittings, these

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O-rings will go missing and the system can look like it's all sealed up, but

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and when that drip gets on the back of your GPU, h you're going to have a

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pretty bad time. Put this up in the blue

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zone. You can see even though there's no O-ring in there, it's sealed right now.

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But let's see if our fluke can pick it up. Oh, dude.

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Easy. And that is a much much smaller leak.

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What a trouble saver that would be. Now, it is worth noting that our brilliant

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strategy of just emptying the loop and pumping it up isn't going to work in

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every situation. Clean rooms, for instance, need to maintain strict

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control of airborne contaminants. And one of the ways that they do this is by

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building them to be fairly airtight and to maintain positive pressure inside.

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Not a ton of pressure cuz like humans need to work in there, uh, but some

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pressure. So, how would they track down then a low pressure leak? Turns out the

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answer is Fluke's Beacon. This little device emits sound at 40,000 hertz, well

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beyond what would bother any human. You just pop it into your system, seal it

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up, tune it to 40,000 hertz, and

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theoretically, we should be able to find our leak. I can definitely detect it

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through the acrylic now, but our system may be too complex for such a short

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wavelength to travel through like that. It's probably just because this knows

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there's sound coming from here or somewhere off the side and so it's not going to pick up the same frequency

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somewhere else. >> Hold it up over there then. >> Oh, dude. Bingo.

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>> You know what? This would be a great opportunity to check the multiple source

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feature here. >> Ooh, yeah. So, in acoustics, we can

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click multiple sources and then Oh,

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dude, that's so cool. It'll show the different levels. However, those still

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totally overpower it. >> Really? >> Yeah. that really doesn't care about

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this leak unless it's the only one on screen. Very interesting. Wonder what

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else we could use this for. A really cool application for acoustic imagers is

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identifying problems with transmission towers at a distance, say from the

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ground. It apparently works at up to 120 m or 393 ft and can be used to detect

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partial discharge or arcing, the sort of thing that could lead to a forest fire.

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Now, we don't have anything like that to test, but we do have some whiny

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electronics like this GPU that has some coil wine. Now, coil wine isn't

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dangerous like those transmission tower problems. It's just vibrations in board

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components, specifically the coils, as electricity passes through. It's just it

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can be pretty flipping annoying. Now, you can see that I'm not picking

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anything up right now. That's because this GPU isn't under load. Let's just

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plug in our keyboard using a handydandy spec cable from ltstore.com and fire up

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a GPU inensive application. There it is.

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But where is it coming from specifically? There's a hot spot right

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where the 12vt 2x6 comes into the back of the board. Yep, it's right across the

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back of the card where all the VRM would be. Doesn't really help us solve the

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problem, but now we know. Actually, I had another situation very recently

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where coil wine was driving me absolutely nuts. I use these USB fiber

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optic docks in order to have my system downstairs, but my monitor and all of my

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peripherals upstairs. I was hearing this like high-pitched almost like a CRT TV

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in the next room whine. I was like, can anyone else hear that? Where's that coming from? And everyone's looking at

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me like I'm crazy.

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I'm having trouble getting it to go lower. >> Change the decibb from automatic to

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manual. It's trouble though when you get into the low frequencies because if you

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talk you can actually see it >> exactly when it's something that you can

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hear like go wine it's always going to be in the frequency that we can hear so

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it can be a little bit of trouble >> right at like 10,000 hertz. That's not

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even that high pitch. Why couldn't anybody else hear this? It was driving me freaking nuts. Like can everyone can

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hear 10,000 hertz, right? Some with hearing loss or significant age- related

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hearing decline might struggle to detect it. >> So you shouldn't have had any problems. Listen. Listen. It's really cool how

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adjusting the frequency band as well as the sensitivity can really help you dial

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it in to detect particular things. Of course, your next question is probably,

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"But what can I do about coil wine liners?" Some people have reported

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success putting over these vibrating components, but your mileage, not to

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mention your warranty, may vary. Is this

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kind of analysis a practical application for such an expensive device? Yeah,

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probably not. But there are more affordable options for this sort of

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thing. The Fluke III500 is about $85,000

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but is just limited to the leak Q functionality that we showed you guys

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earlier with a more limited frequency band. Our II15 has some added functions

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like mech, which detects things like a faulty bearing in an assembly line to

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help identify and fix problems during planned downtime rather than when they

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just come up unexpectedly. But if you want to go even cheaper, you totally

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can. Other options are out there and there are even open- source acoustic

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imagers. The Centenna, a modular system,

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looks like a standout. Of course, that sort of thing means that the calibration

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is entirely up to the user. If you're a business, well, you might not want to

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deal with that. All right. Do you think they're done with the fixes in the shop? How'd all the fixes go? We're thinking

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the regulator was leaking. It may have been the hose, but we swapped both out.

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I wanted to replace the hoses anyway. The connection before was questionable

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at best. Tore the regulator down, rebuilt it, and no leaks at all.

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Sometimes you just have to take it apart and put it back together.

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This one was a little bit different. I knew that there was a leak in here cuz this wasn't tight enough, but I

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discovered that there was also an O-ring missing in her fasteners. Just

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completely missing. >> Yeah. I was actually quite surprised

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that it wasn't leaking worse than it was, but we ended up getting it put back

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in and now it's good and tight. >> So, that was never in there.

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>> No. This whole time? >> Yeah.

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>> So, it was only the two leaks. That was it. Well, then what is this that I'm

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picking up right now? I knew it. It's another segue to our

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sponsor. Wow. Wow. Kind of rude, but it's okay. I

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play, but this ain't no game to me, okay? This is my life now. Hey, hey, if

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you want silly little boxes filled with simple hit points, you can head right to

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Rusty Richard's Lot down the road, okay? And he'd be happy to see you. What I got

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here is premium pre-owned instruments of death, meticulously detailed inside and

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out. Every bit of damage affects components, not a big green bar. Mama

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used to say, "Damage is as damage does." Everyone seems to forget that. See, when

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you get behind one of Johnny's French Jaguar A's, you're going to be fully

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immersed. All right, these combat vehicles run on petrol, diesel, Xbox,

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PlayStation, PC, mobile, your mom, you name it. Use our link for extra

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vehicles, packs, and more. Or don't. It'd be your loss anyway. See if I care.

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If you guys enjoyed this video, why not check out the one we did on a Caterpillar branded smartphone that has

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a Fleer thermal camera built into it. That was pretty cool.