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Original Message
RE: -75 dB
Posted by tomservo on June 25, 2014 at 14:29:15:
What a -75 dB null means is the difference between the two was 1 part in about 30,000,000.
If one were to change the level of the signal you were listening to by that amount, it would be a change of about 1.4^-8 dB, or "pretty small".