[Cyborg] Aireal: Interactive Tactile Experiences in Free Air

[Derek Razo]

Hello there!

Im Derek, new to the mailing list.

I've been working with the leap for a bit, mostly writing an OSC external
for max msp. This is definately one of the more promising haptic interfaces
I've seen.

I wonder how detailed a texture you could get, and how many "haptic pixes"
you would need for a really immersive experience?

It would be very cool to hack something like this together.

Derek


On Sun, Jul 21, 2013 at 4:36 PM, Carlos Castellanos <carlos at ccastellanos.com
> wrote:

> Sound artist Miha Ciglar has been using ultrasound as a sort of
> instrument/synthesizer interface. His work is pretty cool. He basically
> just lays a bunch of ultrasonic transducers on plate and uses them as
> pretty fine-grained interface to music/sonic parameters:
>
> http://www.ciglar.mur.at/sonicbeams.html
>
> I was working on an art installation using this technique a couple of
> years ago but have not been able to get the funds for it. The
> method/equipment used in Iwamoto et al. (2008) looks relatively simple and
> inexpensive so I was going to go with that. This AIREAL looks a bit more
> sophisticated (and expensive?)
>
> -Carlos
>
> On Jul 21, 2013, at 10:57 AM, Todd Anderson <todicus at gmail.com> wrote:
>
> That is really cool! I've heard of vortex generators used as scent
> delivery devices, and even tried to make one with an old camera aperture
> and a speaker. The speaker didn't have enough displacement, I think, so
> just covering the open end of a tin can with stretchy material, and making
> a small hole on the opposite side, gave better results (though required a
> finger tap).
>
> As for latency, they say ~140 msec at a distance of 1 meter. Good not
> great. Here is a chart of vortex speed vs distance traveled:
>
> <Screenshot_7_21_13_1_51_PM.png>
>
>
> The phased array ultrasound mentioned in the intro sounds pretty awesome;
> has anyone experienced something like this?
>
> "In ultrasound-based acoustic radiation fields [Iwamoto et al.
> 2008; Suzuki et al. 2010; Jason et al. 2011], a two-dimensional
> array of 324 ultrasonic transducers operating at 40kHz form a
> beam of ultrasound using a phased array focusing technique.
> Because of the low ultrasound frequency, 99.9% of incident acoustic
> energy will reflect from the human skin creating a pressure field
> which provides perceivable tactile sensations. By modulating the
> ultrasound beam at ~200 Hz, the perceived intensity of tactile
> sensations increases due to the high sensitivity of skin to vibratory
> stimuli at this frequency [Sherrick 1991]. A phased array technique
> is used to control the focal point of the ultrasound beam
> [Suzuki et al. 2010]."
>
>
> On Sun, Jul 21, 2013 at 10:47 AM, Eric Boyd <mrericboyd at yahoo.com> wrote:
>
>> http://www.disneyresearch.com/**project/aireal/<http://www.disneyresearch.com/project/aireal/>
>>
>> It looks really cool!  Basically, vortices of air are directed at the
>> user as they interact with a motion detection system (like Kinect or Leap
>> Motion), and the air pressure changes are the haptic feedback.  I'd love to
>> know how it actually feels.  It looks to me like one of the big limitations
>> is gonna be the lag time - it's gonna take a noticeable amount of time to
>> generate and propagate the air to the user, so feedback can't be super fast.
>>
>> They claim they 3D printed most of the device.  The actuators are
>> actually speakers ("whisper subwoofer").  I imagine if you have a leap
>> motion you could hack together something like this...
>>
>> Eric
>>
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>
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> c a r l o s   c a s t e l l a n o s
> interdisciplinary artist + researcher
> DPrime Research
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> http://ccastellanos.com
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