On 2013-04-20, Eric Carmichel wrote:
But here's what I don't understand about the quaud (quaud.io) mic:
They say the four omnidirectional mics lie on the corners of a
tetrahedron--essentially same arrangement as Soundfield, but with omni
mics and positioned on corners of tetrahedron.
For a n
On Sat, Apr 20, 2013 at 02:38:42PM -0700, Eric Carmichel wrote:
> So I'm not always clear as to whether it's the mics' virtual
> orientation in space, or the physical boundary of a spherical
> surface, that *shapes* the sound and creates the requisite time
> and pressure differentials.
Omni mics
On Sat, Apr 20, 2013 at 03:49:22PM -0500, David Pickett wrote:
> Granted this is better than the mics that Blumlein could command,
> but when it comes to the processing of the raw outputs, is not the
> problem of lower level signals produced by subtraction still a real
> one?
It certainly is. The
On Sat, Apr 20, 2013 at 01:08:57PM -0700, Eric Carmichel wrote:
> A highly-directional mic can be created using omnis and beam
> forming, but not a *series* of directions at a given instant.
??? What would stop anyone from using whatever beamforming
algorithm twice (or more times) in parallel, u
I truly appreciate your informative and highly detailed response. For
helping understand spherical harmonics (or Legendre polynomials?), and
for mics lying on surface of a sphere, this helps a lot.
But here's what
I don't understand about the quaud (quaud.io) mic: They say the four
omnidirecti
On 2013-04-20, David Pickett wrote:
But... How close to the theoretical A format polar diagramy are the
XYZ components of the Soundfield (or Tetramic) microphone at
frequencies above those at which they are essentially coincident?
Rather far from them, because the ideal A format response is a
At 15:27 20-04-13, Sampo Syreeni wrote:
If one regards the subcardioid as made up of omni and figure of
eight components, is it not the case that the ambisonic XYZ signals
of the Soundfield Mic are derived solely from the figure of eight components?
Not quite, because at high frequencies the
On 2013-04-20, David Pickett wrote:
If one regards the subcardioid as made up of omni and figure of eight
components, is it not the case that the ambisonic XYZ signals of the
Soundfield Mic are derived solely from the figure of eight components?
Not quite, because at high frequencies the mics
On 2013-04-20, Eric Carmichel wrote:
Does beam forming or delay techniques to create additional first-order
patterns from the omnidirectional mics change up the design (and math)
from arrays using intrinsically cardiod mic elements?
Not per se, as we can see from designs like the Eigenmike. H
SNR wouldn't have been my initial concern because I have some wee-tiny
electrets that have (purportedly) +10 dBA noise--pretty low for a small
capsule.
When I think of the "classic" multi-polar mics such as the
AKG-414, the multiple patterns are often derivatives of back-to-back
diaphragms sha
At 11:24 20-04-13, Eric Carmichel wrote:
>Just received an email which - seems someone else is reinventing the
>Soundfield again - see http://www.quaud.io/
>This time it's based on mems microphones and is very small so it ends
>up using blind source separation in order to get good
>source-interfer
Just received an email which - seems someone else is reinventing the Soundfield
again - see http://www.quaud.io/
This time it's based on mems microphones and is very small so it ends up using
blind source separation in order to get good source-interference ratios.
There's only one reference to G
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