dBRN

decibels above reference noise
Found on http://www.encyclo.co.uk/visitor-contributions.php

dBrn

dBrn through a C weighted audio filter, matches the ear's response.
Found on http://www.encyclo.co.uk/local/20957

dBrn

Power level relative to noise, dBm + 90
Found on http://www.encyclo.co.uk/local/20957

DBrn

The symbol dBrn or dB(rn) is an abbreviation for decibels above reference noise. Weighted noise power in dB is referred to 1.0 picowatt. Thus, 0 dBrn = -90 dBm. Use of 144 line, 144-receiver, or C-message weighting, or flat weighting, can be indicated in parentheses. With C-message weighting, a one-milliwatt, 1000 Hz tone will read +90 dBrn, but t...
Found on http://en.wikipedia.org/wiki/DBrn
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