I seem to remember the Zylia uses Primo electret capsules. And this post on
the Prorecording list seems to confirm it:
https://www.tapatalk.com/groups/prorecordingworkshop/zylia-microphone-t19409070.html

And this AES publication confirms at least the electret part:
http://www.aes.org/e-lib/browse.cfm?elib=17902
"Zamojski, Jakub Affiliation: Zylia sp. z o.o ... a spherical microphone
based on inexpensive electret capsules"


Op do 16 aug. 2018 om 20:33 schreef Stefan Schreiber <st...@mail.telepac.pt
>:

> I don’t believe at all that they (Zylia) are using MEMS clusters...
>
> Otherwise very interesting thoughts in the cited mail below...
>
>   I also believe that noise of different capsules doesn’t add up (so I
> agree with Bo-Erik, at least at first sight), but we can’t get below
> the noise floor of a single capsule. MEMS type or not...
>
> Typical specifications (High performance MEMS audio sensor):
>
> https://www.st.com/resource/en/datasheet/mp23ab01dh.pdf
>
> (SNR: 65dB)
>
> I personally would be very interested in a PRO version of the Zylia
> ZM-1 microphone, especially since even the current version seems to be
> (quite? very?) nice. According to various personal reports....
>
> Best regards
>
> Stefan
>
> - - - -
>
> Citando Bo-Erik Sandholm <bosses...@gmail.com>:
>
> > I agree with Len, we have not seen any technical spec of self noise level
> >
> >  of the MEMS (clusters?)  that are used in Zylia.
> >
> >
> >
> >  Only text saying that in normal musical recording situations self noise
> is
> >
> >  not disturbing :-).
> >
> >
> >
> >  I have a personal theory that self noise of physical elements in an
> >
> >  ambisonic mic array is not directly additive.
> >
> >  The basis for my theory is that as we convert to B-format the noise from
> >
> >  all the physical elements are distributed over a spherical surface,
> >
> >  and the noise level for a virtual microphone in decoding do not have the
> >
> >  full sum of the added microphone noise levels.
> >
> >  Only coherent noise within the take up volume of the virtual microphone
> is
> >
> >  relevant in that directional microphones response.
> >
> >
> >
> >  But I am can be totally wrong in this mental visualization of the
> decoding
> >
> >  process. I have not done any mathematical research of this...
> >
> >
> >
> >  Bo-Erik Sandholm
> >
> >  Stockholm
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