Phil Leigh;611211 Wrote: > Hi - in brief, no the max null is not 100. The theoretical max null is > -144dB if using 24-bit recording. In practice we know that 24-bit is > impossible with readily available tech so it's more like -120... in > practice, getting a null under 100 is tricky - you won't get that with > any old PC soundcard. > > The purpose of the control test is to set a baseline using prevailing > conditions. 90+ is a VERY good null. > > As I said, some of these differences are small... but they were there. > I did repeat each test 10 times. So does this mean that your figures are effectively in decibels ie null of 96= lowest difference is at -96db?
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