Following up on the insightful comments from Fons et al. - The increase or decrease in noise relative to the self-noise of a single mic is often referred to in the literature as White Noise Gain (WNG). This can be calculated or measured for linear filtering operations such as Ambisonics B-format encoding or virtual microphone beamforming. Lower numbers are worse; negative values indicate an increase in noise level relative to a single omni mic, and positive values indicate a reduction in relative noise level.
For the Eigenmike, we take this into account as a design constraint in our software, and even give the user a few options to trade off this constraint against the operating regions of the higher-order signals. We did post some documents specifying the WNG (as a function of frequency) on our website not too long ago, both for the B-format encoding (“Eigenbeams”) as well as the virtual microphones (“Modal Beamformers”). This is specific to our hardware and software and may differ in others’ implementations. Eigenbeams: https://mhacoustics.com/sites/default/files/Eigenbeam%20Datasheet_R01A.pdf <https://mhacoustics.com/sites/default/files/Eigenbeam%20Datasheet_R01A.pdf> Modal Beamformer: https://mhacoustics.com/sites/default/files/Beamformer%20Datasheet_R02A.pdf <https://mhacoustics.com/sites/default/files/Beamformer%20Datasheet_R02A.pdf> -Steven -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20180818/cd3009ac/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.
