I've been playing around with electret microphone configurations and I was wondering if (instead of the typical single ended configuration) a differential configuration would provide a better S/N ratio. My thinking here is that the differential signal now provides twice the voltage differential and the noise is common mode rejected. I don't have test equipment good enough to measure the actual levels here but to my ear it does sound like the S/N has improved over my previous single ended configuration.
There is another trick to improve the S/N ratio by paralleling two microphones such that the signal is increased by 6db but the noise being uncorrelated only increases by 3db.
Is this differential configuration doing the same thing or is it doubling the signal while keeping the noise at the inherent source level?
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There is another trick to improve the S/N ratio by paralleling two microphones such that the signal is increased by 6db but the noise being uncorrelated only increases by 3db.
Is this differential configuration doing the same thing or is it doubling the signal while keeping the noise at the inherent source level?
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