Sebastià V. Amengual wrote:
I could be wrong, but as I understand, as far as the distance between
the microphones is much smaller than
the wavelength, it is possible to obtain first-order microphones with
any kind of directional pattern. Thus,
at least for a limited frequency range they could create the four
cardioid signals or directly the B format
signals, just using linear combinations of the signals (delay and
sum). Again, for a limited frequency range...
Yes, but "how limited"?
Because Ambisonics works best at low frequencies and this mike best at
high frequency range (?), your hint matters - but there seems to be
still some real problem here.
I believe you could build such a miniaturized SF mike easily with
cardioid-response MEMS capsules - if really available!
Could be a fun project... "Everybody knows" that a SF mike is a good and
flexible stereo mike as well. (Virtual microphones.)
Means all you could record stereo or B format ("360º-720º YT audio" :-P
) w/ your smartphone.
Best,
Stefan
P.S.: As said before this would be a CE microphone just being "good
enough" - not an attempt to design a cheap professional mike.
I am not sure how they would manage to get an acceptable directivity
at all frequencies...
I worked on comparing different methods in my master thesis analyzing
the performance using different spacing
between microphones, just in case anyone is interested on this
http://www.diva-portal.org/smash/get/diva2:752195/FULLTEXT01.pdf
Thanks!
Best,
Sebastià
A 30.10.2016 14:41, Jörn Nettingsmeier escrigué:
On 10/28/2016 08:22 PM, Marc Lavallée wrote:
Here’s the link to the first “article":
https://www.arkamys.com/ambisonic-microphone-ep01/
<https://www.arkamys.com/ambisonic-microphone-ep01/>
What a load of bollocks. Four omni capsules spaced closely together
will give you... [drum roll]... an omni microphone. So yeah, we've got
W, so we're ambisonic :)
They probably got inspired by the other loads of bollocks that get
attached to VR camera rigs to enable them to be marketed as A/V
solutions. Nokia and others do it, so it must work, right?
It's nice if video and recorded ambient sound are recorded from the same
perspective?
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