Making and Testing a Homemade Parabolic Mic
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- čas přidán 8. 07. 2024
- After a year of serious deliberation, Jason finally decided to wear one of many of his goofy as hell hats from his entirely real collection, and as such, it had to be sacrificed.
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Make Magazine Volume 14
mods-n-hacks.gadgethacks.com/...
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Patreon: / modernrogue
Discord (patron reward): / discord
MR Articles: themodernrogue.com
Outtakes & BTS: / scamstuff
Subreddit: modernrogue.reddit.com
Merch: shop.themodernrogue.com
Twitter: / modernrogueshow
Instagram: / modernrogueshow
Facebook: / modernrogues
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Music used in this episode:
"Twrk" by Tesk
chillhop.bandcamp.com/album/s...
"Tell Me" by Tesk
chillhop.bandcamp.com/album/s...
"Gardens" by Otesla
chillhop.bandcamp.com/album/c...
"Puguliese" by Flughand
chillhop.bandcamp.com/album/c...
"Breeze" by The Deli
chillhop.bandcamp.com/album/c...
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This episode was made with the help of:
Brian Brushwood - host -- / shwood
Jason Murphy - host / research -- / captainmurphy
Brandt Hughes - camera operator / editor -- / gatowag
Bryce Castillo - camera operator / live audio engineer -- / brycas - Zábava
XX CQ XX
ATTN AGENTS
SHURIKEN AND THROWING CARD KIT GIVEAWAY AT HTTP://GIMME.SCAMSTUFF.COM
NO CODEBREAKING REQUIRED. HAVE A GOOD WEEKEND.
XX GL XX
The Modern Rogue wow. Thank you. I will have a lazy weekend not deciding any codes
*decoding
I honestly feel kinda cheated now. :[
Grilled cheeeeeese...
HAHA i said i would start decoding for the first time, since the anouncment the new codes, the next modern rogue video but seems like i dont have to.
I 100% support lighting more stuff on fire for no reason.
Eoin Oravetz I second that motion
Eoin Oravetz I third that motion
I support this.
Oh and sledgehammering it!
There needs to be a gif of it.
*Tapes broken paint roller to umbrella hat*
"Does that look right to you?"
"I got the fake turd instead ...
'CAUSE I'M A MODERN ROOOOOOOOOOOOOOGUE!!!"
lol
Hey Tracer!
I came down here to comment that
modern rooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooge
I actually thought that paint roller was a microphone for a good 5 seconds.
Kevin Balderrama You silly goose
Kevin Balderrama Don't worry me too lol
I thought so too, but then I realized that using a shotgun mic for the experiment wouldn't make sene
well I'm about half way through the video and I now realize your right
Kevin Balderrama you just pointed it out to me •_•
Modern Rogue: this is just a random idea, but if you really want to make a parabolic mic, maybe try getting an old satellite dish from a junkyard? i mean, those are properly calibrated to accurately pick up a TV signal. Stands to reason it would work for analogue signals as well as digital.
I thought that's what they were going to do.
I think that's technically called "just buying a parabolic mic," which sorta takes the DIY out of the equation.
Modern Rogue: but you were okay with buying a parabola in the form of a hat. What's wrong with a parabola in the form of a satellite dish?
Robertlavigne1 The fact that the other is a satellite dosh designed to be really accurate with reflecting the shit, you know... and then the other one IS A FUCKIN NOVELTY HAT
dish you fould at junkyard = parabolic microphone
"We're like, the MacGyver of Garbage"
Sooooo, just MacGyver then.
Fun experiment! It looks like your boom may be too long. If you trace a ray coming in from the front parallel to the boom but offset to the side a bit, it looks like it would hit about halfway (or less) up your boom rod. One way to determine the focal point might be to put a few pieces of reflective tape at various points and shoot a laser straight in from a distance: see where the point lands. Also, the umbrella is not parabolic which means you won't have a single focal point and that can actually cause sound cancellation when some of the sound hits the mic out of phase.
Well, we already have reflective pieces in there... 52 cards worth, to be exact.
"Gaff tape does everything"
As the person who works in Theatre, that is a fact. It's better than Duct-tape.
Mrmoocows99 gaff tape is a term for electricians tape, tape that expands and becomes sticker as it’s stretched. Causing it to contract around what it is placed on. They used duct tape, though, your point still stands true
@@sevenblizzards7077 This is incorrect. There are actually multiple ways that gaffer's tape is different than both electrical tape and duct tape but the primary difference is that gaffers tape is cloth-backed. I would recommend taking a look at the Wikipedia for gaffers tape for some more info.
Also, you can see that the tape being used is labeled as "Gaff" at 7:18
SevenBlizzards 707 god dam you are so edgy
that hat is probably one of the most useful inventions i would never use
ahhh Kramer
Right it's sort of more convenient than an actual umbrella is
Honestly I used mine all the time till it broke lmao
Congrats on 300k guys. You're my favorite pair to watch!
Tommy Callaway 607k about a year later
Omar Leyva Gutierrez they still deserve so many more. These guys do more work than GMM, and actually educate people thoroughly.
I love you, Brandt. Thanks for having the "uhh where's the sledgehammer" part in. I died.
They've got parabolic mics (kind of) at the Pacific Science Center in Seattle! At one of the entrances, there are two parabolic reflector things about 50 feet apart. If one person whispers into one disk and one person listens to the other, you can still totally make out what they say! I know I'm about a half a year late for this video but I'm going through the whole playlist now :^) Gotta rep Seattle when I can, lol
k...
next make x-ray glasses
i will finally be able to see throught the pants of the thicc girl of my class! yes!
***** lol
I want a Giant Megaphone that can make Fart Noises across the English Channle
Chris just eat enough grilled cheese
Chris Ng check out colinfurze fart at France
6:03 sums up the internet pretty well
Macgyver-ing is the theme of this show apparently
Dzimina
yeah..but.... all this shit'll actually work
"cut a tiny hole"
"ok"
*stabs right through*
make a metal foundry/forge and make the gentleman's weapons yourselves
Tyler Flint That would be super cool
Tyler Flint tons of pommels.
Bordermemes I see that you know medieval forbidden techniques
Ximarre You have to nowadays for a pommel is the only way to end someone rightly.
Yooooo 300k!!!! Congrats on the milestone guys. Love the show
Alfred von Schlieffen this comment was also 3 months old genius
You guys are the greatest. Your content is so unique and refreshing and the nerdy banter and jokes between you two really brings everything together. Lets get modern rogue to a million subs!
Hey Modern Rogue!
Just a hint: The microphone that you use matter. You must aim for a high sensitivity directional mic. It might worth a shot to create a simple high gain low noise amplifier for this task probably with some filtering. Search for super ear circuit. It is very interesting and not that complicated as it sound.
I'm so early there isn't even the giveaway on the comment section!
Yep, I'm only here for the code haha. I can watch the video whenever.
Just Hawk same
I honestly don't think there is a code this week. The giveaway page has no text box for the hidden code.
Just Hawk HAHA the giveaway was put 22 minutes ago 😂😂😂, thank me later
Early as in pregnancy?
#GRILLEDCHEEEEEESE
Max Fury you mean so much to me!
Grilled Cheese, you're so mean!
Quite possibly the cheesiest song known to man & beast!
It's crazy how naturally your dialogue flows, and how you're amazing each other with new ideas and stories the other person has never heard. A lot of that spontaneity would probably be lost if you researched and prepared these videos together.
My grandparents live in a canyon type place and they can hear people having a conversation that are maybe about a mile away from their front porch... kinda creepy😂
Been on a binge watch Modern Rogue marathon. You guys are like the spiritual sequel to the MythBusters to me.
If you get a junked old satellite dish, you've got all you need.
That's a little bit like saying "if you get a parabolic mic, you'll have a DIY parabolic mic!"
2:38 in a place where i worked at (it was a science place) we gad an ecosphere and it was made from triangles in such a way that the sound was directed from one side of the room to the other, it was so cool, you could hear someone whispering from a far
This is one of my favorite channels, they cover everything from alcohol and fighting techniques to homemade body armor!
How do you guys have insurance to do this when Brian is just freely setting fire to whatever he wants?
Aren't they in Texas? What is insurance?
@@maxinator80ify A scattergun
Great video !
Btw big fan since the first episodes of scam school
Peter Black me too. hell... I even miss the hair. For just one upload, He should spike it like he used to..and not mention it at all. Just do the video as if he didn't have sonic the hedgehog on his head.
You guys are so amazing! I can't get enough of Scam School and Modern Rogue!!
If you stand at the back of an empty cargo bay of a cargo 747-400 aircraft, it does the same exact thing if people are talking up towards the upper deck boarding stairs. Very clear and very audible
Anyone else just want those golden playing cards?
your pofile picture is my answer
Vallu M check their website they're a thing you an buy now!
I haven't finished watching the video yet but I would've made the microphone adjustable so that as I'm recording I can adjust the microphone up and down and find the exact focus.
300k! Congrats guys
Every summer I work at an amphitheater that has a bowl over the stage, just like the hollywood bowl... we, the crew, know that we can walk along that bowl and listen to individual conversations in the audience... but also, it works both ways, we can have conversations across the entire venue just by standing in the right place.
Maybe the microphone was just too far away from the umbrella parabola
That's what I thought too. Maybe pull the mic back inside the parabola some more.
there is a formula for a focal point of a parabola, don't know why they didn't use that
They are never that exact in science, I guess, that's the charme of a Modern Rogue...
yup, which they were a little bit more exact or at least try to be
I hope they tried adjusting the distance from the mic to the umbrella off-camera. I would think there would be a zone where if you are touching or almost touching the umbrella and then out for quite some way, that you would get at least a little boost, but I also think if you go too far away, then you get no boost at all. I wonder if they were just too far away.
I would recommend that you put a cap on the opposite end of the lav, it will cut out the extra noise coming from the side from the AC
ooh, good suggestion!
WOO
300K SUB HYPE
Congrats! :D
Congrats on 300,000 subscribers, Brian and Jason
oh, wow! We made it!
Cong on 300 k
will there be a hacking the system season 2? :'( but this series is cool too. Grats on 300k subs
lol i get so god damn excited every time i see you guys upload a new video!!!!!
there's a museum like 2 hours away from where I live (by car) that has these enormous parabolic mic things, like 40 to 50 feet tall or so, placed like 200 feet apart or something, and you can whisper into one and the person at the other one can hear you. It was the coolest thing to me when I first tried it, and it's still really awesome for how simple it is.
Why didn't they calculate the height of the focal point themselves? It isn't hard to calculate the focal point of a parabola.
I know. Like junior high math. Really weirded me out when they're like "I guess we just have to guess".
Because it's not a parabola
Oh, darn! Your precise vision determined it not to be a parabola! If only someone would have discovered the equations for other conic sections, or a general way of determining normal vectors from a set of coordinates! But alas, such truths are beyond mortal capacity!
Maybe because they were in the middle of an episode, and the production of an episode tends to cost money, so in an almost literal sense, time is money. Or yknow, the fact that unless you’re doing it everyday, you’re gonna forget it because frankly calculating the peak of a parabola or any other curt for that matter is a skill that you never use in the real world without being under very specific circumstances. So just lay off it, cause they didn’t and it doesn’t matter.
You don't have to calculate jack, you simply move the mic in and out while recording and keep it in the spot where the sound was the loudest. We care because we like to see them succeed.
The Modern Rogue Rules
5:57 ahhh now THIS is quality inernet content THIS IS WHY WERE HERE !!
this concept actually works really well, when i was in broadcasting school we had to film football games, and in order to get the nice crunch sound effect on the audio is that there is someone running around with a parabola mic, and because they are expensive in order to mimic that we had a person with a big wok with a lappel wireless mic held up by straws and gaffer tape, and by gosh golly if that didnt work.
Someone need to take all the stupid thinks they say and add 'CAUSE I'M A MODERN ROOOOOOOOOOOOOOGUE!!!" .this deserves to be its own meme.
Haha-- I like that idea. Post timecodes when other people's channels say stuff that sounds like an intro...
What if you use a 5 gallon bucket?
I've been to the White House and it is considered a whisper gallery because of the arced ceiling. The ceiling causes the acoustics to travel to certain points based on the curvature of the ceiling. It was very unique.
Congrats on 300K!
soo would it be socially acceptable if i got stopped by the police because i was burning then smashing things in the street and my only excuse is me yelling "The Internet!!!"
Only one way to find out....
Challange accepted. Its hold my beer time.
Chris Kowal why are you on computer, go outside so beautiful *ungh!*
The modern rogue burning down studios since 2016
Love these longer episodes :)
I listened to other tests doing the same thing and it does make a major difference when you use better equipment. The parabolic listening devices are actually very good if you have a proper reflective surface. Some radars use that same design and work very good (actually excellently) and often outperform other types of radars. That is why you will see parabolic antennas for deep space listening and for over the line of sight radars.
Rip aricibo observatory
Inconspicuous spy gadgets...
This is what a classing MR episode is. Bring them back!
I'm loving the lo-fi on the background
Really weird illusion at 2:20 (focus on the umbrella for about 10 seconds)
The Razors Edge Yeah, at 2:24. That's weird
Yeah it looks like his hand disappears, because he flips the umbrella just right.
That's Tim's 3d dragon illusion.
the problem for sure is in the angle, since every point wont bounce to the exact place where microfone is
It would've worked, just needed to be closer to the focal'ish point.
The main thing about directional microphones is that they *don't* make far away sounds louder. Instead, they cancel out or significantly lower the level of unwanted sounds off-axis from where you are pointing the mic.
For example, if you had a omnidirectional microphone a set distance away from a sound source in a busy park, you might be able to hear the sound source, but it would be masked by all of the ambient noise around it.
Now replace the omnidirectional mic with a shotgun mic (or "interference tube microphone"), at the same set distance, using the same gain settings as before. You will be able to hear the sound source much clearer, as the off-axis sound has been significantly lowered, however the actual level of the sound source remains the same.
Parabolic microphones work in the same way. They leverage a parabolic dish's property of focusing reflections off of the dish to a focal point, so only sounds that are going directly into the dish will hit the microphone. You'll still need to use some sort of directional microphone, as you could still pick up noise off-axis that hits the microphone directly, instead of bouncing off of the dish. However, Parabolic microphones are typically relegated to specific use cases, as the dish tends to only reflect a narrow band of frequencies. The sound you get out of a professional parabolic microphone will typically have the sound quality similar to a land line telephone.
-kruvek from chatrealm
Well, it wasn't the mic in this case, but good info.
If you're like me and do everything ad nauseum then here's something that'll make this a little easier. Setup a parabolic function on a poster board you measured out like
f(x)=(1/8)(x^2) then measure out some dots to base your graph on, then put a lot of x values into the function and do it on your calculator, mark dots at every on of the values of he function, once this is one you now have a template of a parabola and use that template as a guide to bend some steel wire into that shape; do this multiple times until you have a large amount of these steel wires. Now, a little bit of calculus. The focal point will be at the point along the y axis between the point of the slopes being 1 and -1; this is found by finding the derivative function of the one which ends up being f '(x)= (1/4)(x^2). The value of f '(x) is equal to the slope at that x value so the algebra ends up being:
f '(x)= (1/4)(x^2)
f '(x)=1
1= (1/4)(x^2)
4=x^2
x=2
What this means is that you're going to measure two of the units on your poster board out, then go straight up. Do this to the other side and then do it to the rest of them, the exact midpoint between your two marked lines will be the focal point. Array of your steel wires in a circular formation so it looks like a cone and then cover the inside with some aluminum plates (just go to home depot). Align your speaker's receiving end with the focal point and there you go. A parabolic mic, and replace the plates with reflective mylar and there you have a parabolic mirror capable of burning stuff.
kipkay made one from a megaphone. i dont like kipkay
Kinda sad watching this now in late 2020 and hearing them bring up Aricebo, rip radio space telescope
Ikr
Yet another victim of that (deity of choice)awful year. And of course I recognized it as the Cradle from GoldenEye.
Love you guys man. I'm a new subber but you guys make my night this should be on tv 💯♥️
I have no knowledge whatsoever about the physics of sound. but I did buy my son a parabolic mic for Christmas. the cone was deeper than it was round. I think that narrowed the area of receipt and allows for a more focused listen. we were able to listen to Whispers from across our house. wind chimes from about maybe a hundred and fifty feet. I'm guessing that maybe because your cone was so wide you might've heard much more focused sounds at a longer distance though it would have been quieter. I'm not going to lie I like to play with parabolic mic concept some more. it fits my son's love of spy gear and kind of tickles my modern Rogue appeal
I want those cards... but I cant find them on Scamstuff. :(
www.scamstuff.com/products/card-target-throwing-star-kit
Good guy brian
The hat is not a true parabola. Do the math and make one out of cardboard and aluminum foil.
robert jeffery Sure, it's not a true parabola, but it is a decent approximation.
My suggestion was to try again with different junk.
I'd say its a lot harder to approximate a parabola with cardboard and aluminum foil than with an umbrella hat.
robert jeffery I made a solar cooker in Cub Scouts in the '70s. How hard could it be?
Yes please redo
The whisper dish was one of my memories as a child. I think it was in "Sesame Place" in PA. It was two concave dishes that you could speak at a normal volume at the focal points and people between couldn't hear you. It was definitely mathematically calibrated so that both speakers were in the focal point.
Whoa. Sesame Place. That takes me back.
congrats on 300k!!
if i go 3 units out shouldn't it be 1/9th as loud and not 1/16th?
Nirjhar Mukherjee he went out two more not one more
I see. Didn't see that. Thanks
anyone else got grilled cheese song stuck in their head now . ?
congrats on 300 000+ subscribers
Chichen Itza is an amazing thing to see. I was fortunate enough to see them play them a Maya Ballgame at Chichen Itza before they stopped doing that. It is amazing.
that acetone + sledgehammer part was more cringey than brians previous haircut lol
Tacettin Koşar LMFAO
That haircut really was quite dreadful. Brian clearly outgrew that look decades ago.
Last time I was this early, the earlybirds were angry at me for waking them up.
It's interesting how you basically found out what to use the parabolic microphone for. It narrows the field of sound while slightly amplifying whatever's directly in front of it. It doesn't amplify things as its main purpose, but rather collects more of the sound than the microphone could without the parabola, while cutting out interference from competing sources. This makes it excellent for long distance listening. For a better illustration, you should have tested it outdoors, eliminating wall echo and room reverb, as well as using a unidirectional microphone. Very interesting showcase of exploring use case by testing and modifying as an iterative process.
Yeah, I wish we had more time and resources... a unidirectional mic would have been so helpful to test.
you guys are like mythbusters how do you not have more subs
no it is not parabola
stop calling it parabolic
if you've got a beef, why not take it up with Wikipedia, rather than the CZcams comments section? en.m.wikipedia.org/wiki/Parabolic_microphone
The Modern Rogue z
Abdullah Rahman boi get reckt
The Modern Rogue same, bitch.
en.m.wikipedia.org/wiki/Parabolic_reflector
This channel is one of the best on CZcams. I really hope they get to 1mil soon
Us, too!
3:36 "I got this on amazon." Jason Murphy's catchphrase for MR.
2nd!
Dude, you're first.
Nice work guys make more videos... You guys are very funny and genius to
321 contact! one of my favorite 90's shows.
The whole "he's talking about the mic, not the hat" was very useful
that parabolic mic is trippy as hell. its like one of those weird optical illusions
This would have worked perfectly! With the deeper shape of your specific parabola, your acoustical focal point was almost even with the parabola's rim. All of your sound waves were being reflected between the mic and the parabola. Your microphone location would have worked for a parabolic reflector whose parabolic curve was more shallow. Still very cool, and I really liked the scaling idea. Plus, 1 in 10 views commented, including me! That's amazing! Thanks for the content, keep it up!
KEKWWW YALL GOT THE DELI FOR MUSIC HELL YA
Nice to know I wasn't the only kid that loved to watch 3-2-1 Contact!
I loved the Johnson Smith catalog, especially around Halloween
Literally have those cards! 🤣 I'm halfway there!!!
PROTIP: A string dangled from two points makes a parabola. So dangle a string, bend a piece of wire to match that curve (the steeper the curve, the deeper within the parabola the focal point will be), then make as many copies of that wire as you like. Attach them all in the center to make the skeleton (you can even weld them, which is a type of fire!). Place aluminum foil along the skeleton (or you can, say, wrap cards in foil and then create the body of the parabola for more structure). The idea is that metal reflects sound better than plastic, so we'd rather use metal.
To find the focal point, get a laser pointer and a mirror. Place the mirror at a random point in the parabola and shine the laser pointer at it from head on. Note the position above the parabola that the light hits. You probably only need to do this once since we're not working with precision materials, but you can do that 3 times to get the exact focal point.
Bam. You now have a completely DIY parabolic reflector. Put a mic at the focal point to capture sound. Put a light bulb at the focal point to create a (crappy) studio light. The world, as they say, is your oyster.
And no, I have no idea if this will work better than your solution. But I *feel* like it will, and that's what matters.
it is a catenary, not a parabola
Couple of suggestions: 1. Tin foil instead of cards. 2. Attach the mic to an adjustable antennae so you can easily dial in the focal point. I would be willing to bet your results would improve significantly.
Lmaooo that shot when you cut the first tiny whole in the umbrella!!
So, cut one tiny hole right there near the center.
*Stab*
*Structure gives out*
Okay...
OMG, I remember 3, 2, 1, CONTACT! I had a subscription to the magazine, too!
Just Brian's justification for setting the paint roller on fire, "The Internet!!"
Brian! Easy way to determine the focal point for something like that is to get two dowel rods, set one up so its running through the center (like the post you mounted the mic to) set the other so it forms a 90 degree angle with the edge of the reflecting surface (the umbrella in this case), join the two dowels to one another at the intersecting point using say, a nut and bolt, and you should be able to verify if this is your best average focal point by using the compass you just built to check the distance of the angled reflecting surface is within a good margin of error.
Also, consider using a sphere and cutting it in half, as its focal point will always be the exact center point on the same plane that you make your cut on. Or even better, one of those nearly half-sphere mixing bowls? if you can get one made of metal all the better.
Good stuff, but wouldn't the easiest way be to stick the mic where all the light is reflecting the brightest?