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The Whirlwind - An iPhone horn speaker and stand that fits in you wallet!

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In a deep "fit for infomercial" voice...
 
"Have you ever found yourself in the NEED to share a video
from your cellphone with other people, but the sound...
was..
just to LOW!!

FEAR NOT!!

The revolutionary WALLET SIZED Whirlwind Speaker
and stand will come to the rescue!"

He he, sorry I just couldn't help myself :D

Joke aside, sometimes I have found myself sharing a video with family and friends, and yes, sometimes the volume is just a bit low.
So, I started to think.
Could I come up with some kind of speaker that could fit in my pocket?
Better yet, in my wallet?

Well, it turned out that I could.

How does it work?
The idea is to redirect sound to you (the viewer) which helps with the volume, but the horn itself will increase the overall acoustic efficiency of the iPhone.
Remember, it's a passive component and does not amplify the sound from the driving element as such, but rather improves the coupling efficiency between the speaker and the air.
Horns used to be called "acoustic transformers" because they help match the impedance between the speaker diaphragm and the air. The result is greater acoustic output from the speaker.

And how does it sound?

Well, in "get you wife and kids to listen to it" tests, it makes the sound out of my iPhone seem twice as loud and deeper.

So, If you use it in a noisy place (like a restaurant) you will be able to hear you video, but without getting the next table to complain.

Now, I'm including the "bone white" version of the Whirlwind, so that you can make your own versions (a steampunk version would look wicked)

Note: It's trivial to modify the horn base to fit any cell, not just the iPhone.
 
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Step 1: Cut the parts

Picture of Cut the parts
P1011297.JPG
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What you need:
  • The PDF.
  • Paper.
  • Thin Cardboard.
  • Glue.
Before you begin, you have to make a decision. For the horn material, good old white printer paper is fine. But you can try out other materials such as Tyvek or wrapping paper that has some cool design, it's up to you.

As to the base and stand, I used a manila folder, which is just thick enough to give support but thin enough not to create a bulk in my wallet.

And last, the glue. Since you will glue the horn with it, you need a flexible adhesive. I used UHU but any non-brittle glue will work.

Now, to work.
Download the PDF and print it out and cut out the parts.

Look at the pictures for the stand and horn base cuts.

Step 2: The horn - part one

Picture of The horn - part one
The horn.

When I was thinking of ways to make the horn, I remembered reading a few years ago about research from Japan in using origami techniques to find ways to fold satellite solar cells. The goal was to fold them in such a way that they would occupy the least volume, but be trivial to unfold.

I looked for and re-found the original paper by Taketoshi Nojima that I had read a while back.

"Origami Modeling of Functional Structures based on Organic Patterns"
 by Taketoshi Nojima
Dept. of Engineering Science, Graduate School of Kyoto University.

I took the model of a conical shell, and modified it in sketchup to make it bigger and longer.

So, it's basically century old Japaneses origami used in aerospace, recycled into a credit card sized collapsible horn speaker :D

Step 3: The horn - part two

Take the printed horn and start to fold.
The folds that form the polygons (solid lines) you mountain fold and the diagonals (doted lines) you valley fold.

It's easy, just look at the pictures and comments to guide you.

I recommend that you start from the smallest polygons, it's easier to fold them first than at the end.

Note to origami beginners:
There are only two types of folds in the cone. The mountain fold (imagine looking at a mountain from the top) and the valley folds (the exact opposite as the mountain: a valley).

Take a piece of paper and fold it in half. If you look at it from the side, in one way it looks like the letter V. That's the Valley fold. Turn it around and it's the Mountain fold (an A without the cross section).

So the horn only has these two simple folds. On the perimeter of the polygon, its mountain fold (the crease toward you) and the diagonals are valleys (the crease away from you)

Step 4: The horn - part three

Picture of The horn - part three
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P1011315.JPG
Once you finish folding, the horn will start to curl up just like in the pictures.
Glue up the tabs to the other side and close up the horn.
Start at the big side, and work you way to the base.

I used a toothpick to help me guide and glue the parts.

Once you finish, fold up the horn and make sure the glue holds up.

Note: you will notice that the horn spins while it fold, how cool is that?

Step 5: Asemble the whirlwind speaker

Picture of Asemble the whirlwind speaker
Take the base, and glue the horn tabs to it.

Step 6: Fold and place in wallet

Picture of Fold and place in wallet
That's it, you finished!!

To put it away place the speaker on top of the stand and use the rubber band to keep them together and protect the horn.

Step 7: Use it!

Picture of Use it!
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To use:
  1. Remove the rubber band and separate the stand from the speaker
  2. Assemble the stand
  3. Assemble the speaker base
  4. Use rubber band to hold tightly to iPhone (be careful no to push all the way in and this way obstructing the cone output)
  5. Deploy speaker
  6. Enjoy!
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turtleson1 year ago

can you give a link to the pdf of a web site, because i am not a pro member and i do not want to pay to download it. Thanks!

Please send me more pictures because I can not understand how to do it
does this work for a Samsung galaxy S2?
urant (author)  marionpixie1 year ago
Hi!

just modify the base so that the S2 fits and it's a go
wbond11 year ago
http://youtu.be/3hRJVw6JTOQ I made this horn for my phone, although my phone is not an iphone, but an android I made some modifications to your design to work for my phone and it works really well. The sound quality is really good, I would say it doubled my volume. My version is not collapsible like yours, but that is OK. Thanks for such a great instructable.  I would like to see on the template though a place for the fold for the stand part to get proper angle without multiple bends because it weakens the paper and then it's useless.
urant (author)  wbond11 year ago
I love the way you mod looks!!
The reflector plate is a great idea.
You know, this maybe the opportunity for you to put together your own 'tible.
Happy modding and making!
wbond11 year ago
I loved this, although the horn is for an Iphone, I made it adaptable to my android.
longwinters2 years ago
This one won't get finished! I tried 4x to d some pics for you, but heither goodle or windows 7 would co-operate, I made a brass horn from a candle stick and a bit of flexible brass, it sounded TERRIBLE! no way I was going to make something that hidious sounding, you obviously are the better sound designer.
longwinters2 years ago
Well if its worth doing its worth overdoing I love this project but the forces of Steampunk demand I make it from brass, I'll let you know if it works in a different medium, it was fun reading all the responses
urant (author)  longwinters2 years ago
Wow!! I think it would look incredible!

Please please please share the finished pictures :D
DavidNZ2 years ago
you should make a mega sized version just cause you can :) awesome design bro!
urant (author)  DavidNZ2 years ago
An iPad version?
darman12 urant2 years ago
Yes! Maybe iPad mini, wink wink :)
urant (author)  darman122 years ago
Well, I just got a mini for my birthday, so i'll try to make some time and build (and post) the bigger version
darman12 urant2 years ago
That would be great! Enjoy you mini, I love mine :) I requested just money for all of my Christmas presents so I could buy one.
urant (author)  DavidNZ2 years ago
Thank you!!
darman122 years ago
"I recommend that you start from the smallest polygons, it's easier to fold them first than at the end."

Haha, I read this when I am halfway through the folds already. *facepalm*
It's funny because the whole time I was thinking "hmmm, I wonder if it would be easiest to start here, or maybe here..."
urant (author)  darman122 years ago
yup, know the feeling
hallo123452 years ago
Please explain where do i glue the two parts from the whirlwind himself
urant (author)  hallo123452 years ago
You put the smallest part of the horn into the hexagonal hole in the base, and glue the two parts together
sakuragirl2 years ago
Also, I don't know if it is possible, but could you make the lines on your pattern the standard symbol (dashes and dots) - - • • - - • • - - to indicate "mountain fold" and just dashes (- - - - - - - - ) for the "valley fold" ? This could be very helpful in understanding the construction at a glance.
urant (author)  sakuragirl2 years ago
Good idea, let me get to work on it and upload the new PDF
urant (author)  urant2 years ago
Done, just uploaded the new PDF
I just looked at the new PDF -- looks perfect. I think this is very helpful.
urant (author)  sakuragirl2 years ago
Thank you for pointing out that modifying the template would make the cone easier to fold :D
tehcookiez2 years ago
When i downloaded the pdf, it ended up all weird code and i didn't get the template, so i that what its supposed to be?
urant (author)  tehcookiez2 years ago
Hi tehcookiez,

I don't know what happened to you download. I just downloaded it in my cubicles neighbors computes and it opens it perfectly in acrobat reader. Try downloading it again and if it still gives you problems, I can email you the PDF converted into a jpeg.
tehcookiez2 years ago
So do you think you could just make a template or somthing? i could just trace it onto harder paper.
tehcookiez2 years ago
Here is one page of what i got, and i got like hundreds of pages so i could never print it w/o running out of paper



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sakuragirl2 years ago
Thank you for this elegant origami. I constructed it and found that I did not like to cut the base on the lines where you cut it. Because this is an origami, I decided instead to fold it. I feel this is more in harmony with the origami spirit. Other than that, I love this design. It's beautiful.
urant (author)  sakuragirl2 years ago
I'm very curios on how you did it. Could you share a pic?
I tried to attach a photo with my comment but failed to upload. Sorry. Here is a photo.
HornBaseFold.jpeg
urant (author)  sakuragirl2 years ago
Ahh, really nice solution :D
Haha. No compliments necessary. Your design is a magnum opus. My friends are so impressed with its elegance. Thank you again for sharing this design.
FrozenIce2 years ago
Errmm well i made this, and it was quite a long process, and the finished product looked amazing!! was even considering printing out a much larger version and using it as a lamp shade! But the real reason for posting this is because it didn't really work... i put it on and everything, but i didn't feel the sound was amplified, only redirected.. Is that the actual purpose? however, if there is one thing i can thank you very much for is not needing to cup my hand to be able to hear the sound better. Maybe that is its purpose?
urant (author)  FrozenIce2 years ago
Hi FrozenIce!

First, if you do make the lampshade, could you post the pic? Or better yet, make an Instructable of you lampshade :D

Now, part of the idea is to redirect sound to you (the viewer) which helps with the volume, but the horn itself will increase the overall acoustic efficiency of the iPhone.
Remember, it's a passive component and does not amplify the sound from the driving element as such, but rather improves the coupling efficiency between the speaker and the air.
They used to be called "acoustic transformers" because they help match the impedance between the speaker diaphragm and the air. The result is greater acoustic output from the speaker.

So, If you use it in a noisy place (like a restaurant) you will be able to hear you video, but without getting the next table to complain.
desbrisay2 years ago
In the pictures it looks like the cone is centered over the iPhone's round button. The speakers are on the bottom of the phone of course.
Is the cone in these photos actually centered over the round button?
If so, does it sound louder if the cone is placed over the end of the phone?
urant (author)  desbrisay2 years ago
Hi desbrisay!

No, the horn is not centered over the button, you can still use the home button while the horn is on the phone. It's just touches the bottom of the iPhone, so that all the sound coming out of both speakers travels up to horn and toward the viewer.
Can you make one of these then send it to me I will pay up to one dollar, my computer is down and I don't know how to print form my iPad or iPod. Soooo I will pay! Thx
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