According to the document linked to below that relates self noise values to real world applications 110 SNR cannot be related to the commonly used reference sound level. 110 dBA SNR would be 16 dB below absolute quiet.
If the value 70dBA that I found for the infineon dual membrane MEMS mic is related to 1 Pascal, then it's self noise is around 24 dB which is not strictly studio quality. But not really horrible. If it is related to max 10% distortion which is at 135 dBA thats not a realistic comparison value as the result is a self noise of 65 dBA. That would be a noise source not a microphone :-) ! So a bit of apples and oranges comparison is going on 😎 http://www.neumann.com/homestudio/en/what-is-self-noise-or-equivalent-noise-level SIGNAL-TO-NOISE RATIO Another way to document the noise performance is to specify the signal-to-noise ratio. But relative to what signal? The reference sound pressure level for noise measurements is 94 dB (which equals a sound pressure of 1 pascal). So you can simply calculate: Signal-to-noise (db-A) = 94 dB – self-noise (dB-A) The actual signal-to-noise ratio in use, of course, depends on the sound pressure level of your sound source. Bo-Erik On Sat, 18 Aug 2018 01:37 Jack Reynolds, <jackreynolds...@gmail.com> wrote: > Are you sure the Ambeo has 110dB SNR? > > Sent from my iPhone > > > On 17 Aug 2018, at 23:56, Paul Hodges <pwh-surro...@cassland.org> wrote: > > > > --On 17 August 2018 14:55 -0700 Ralph Jones <rjonesth...@comcast.net> > > wrote: > > > >> Some folks posting here have seemed to suggest that this level of > >> noise might possibly be acceptable. > > > > Well, firstly we don't know the actual specification of the devices > > used by Zylia. And secondly, using an array of nineteen to generate an > > output gives the possibility of significant improvement, because the > > sound source signals are correlated and the noise is uncorrelated. > > > > How this holds up in practice at higher orders and higher frequencies I > > will attempt to judge when I get my hands on the ZM-1 rather than just > > predicting failure in advance (which is not consistent with the reviews > > I've seen heard and read). > > > > Paul > > > > -- > > Paul Hodges > > > > _______________________________________________ > > Sursound mailing list > > Sursound@music.vt.edu > > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20180818/40e5ff31/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
