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 aren't exactly coincident, so that the following A-to-B matrix derives some of W from the fig-8 (or velocity) components and some of XYZ from the monopole contributions. But almost: XYZ are conceptually just three fully coincident fig-8's, sensitive purely to velocity (and derivable in this case from pressure gradient over time).
Further, if this new mic relies on omni capsules, how will it not suffer from the signal to noise ratio problem of Blumlein's method of deriving stereo from two omnis?
It most likely does, or it has to compensate with an extended array of omnis, adding to cost.
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