good luck getting yourself in a theater with a iosono sound system… guess you could use

Nifty! Although i don’t really understand it. Is he going to put speakers in a similar arrangement? And if so, how does is the recreation affected by the (new) room and position of the listener. I’d imagine this is something for a variable listening position though. .. but what and how and why and what!

Still, good job and interesting concept! makes you think huh

I could think of a few other uses for this.

Namely capturing impulse responses to load up and simulate the acoustic characteristics of an environment. This is usually done in stereo, but with some work could probably fully replecate an area!

That is a fascinating idea.
Great documentation too :D

Interesting. Thanks for the documentation.

@medix
How do you measure wind speed with ultrasound?

Somehow I’m not convinced that a $2.60 mic module is going to give you quality sound reproduction.

There is a reason people spend hundreds to thousands on a single microphone.

“Namely capturing impulse responses to load up and simulate the acoustic characteristics of an environment. This is usually done in stereo, but with some work could probably fully replecate an area!”

Been there. Done that. Fons Adriaensen includes some ambisonic IRs with his JConv software (and I think some more on his website), if you want to know what it’s like.

Another application is to convolve the ambi recording with HRTFs to get binaural sound minus the cumbersome head-sized microphone.
This method does have it’s cons though, as it does not produce synaesthesia like actual dummy heads, and the inexact ITD causes some comb filtering.

“Somehow I’m not convinced that a $2.60 mic module is going to give you quality sound reproduction.”

You’re in for a surprise – all that is needed is a person with the right knowledge. What is usually compromised with these cheap mics is the signal to noise ratio, these capsules are noisy on the low side and distort rather soon on the loud side, so you have to mind your SPL.
Even then, “hundreds of dollars” can get you a perfect microphone, the people who pay “thousands” are just paying for placebo, brand name, or just because they think using the same mic as [blindly praised old artist] will magically improve their recordings.

All that metal doesn’t seem acoustically sound, if you pardon the pun.

M4CGYV3R, If you use google and search for ambisonics and read the websites on the first page and you will find that a tetraeder microphone gives you thrue 3D recordings.

In addition to this you can use the vvmic software to extract the sound capture of one or several different type of virtual microphones placed in the same spot.
http://mcgriffy.com/audio/ambisonic/vvmic/

@M4CGYV3R: I’ve never really looked into it. I didn’t even know it was possible until a few years back when I was visiting a research lab at NREL where they were studying air flow dynamics along mining walls. They were using ultrasonic anemometers to get air flow and direction (in 3D). I’ve been vaguely interested ever since, just never really had the time to check it out in depth. Pretty cool stuff regardless.. ;)