In telecommunication, reference noise is the magnitude of circuit noise chosen as a reference for measurement.
Many different levels with a number of different weightings are in current use, and care must be taken to ensure that the proper parameters are stated.
Specific ones include: dBa, dBa(F1A), dBa(HA1), dBa0, dBm, dBm(psoph), dBm0, dBrn, dBrnC, dBrnC0, dBrn(f1-f2), dBrn(144-line), dBx.
Famous quotes containing the words reference and/or noise:
“In writing these Tales ... at long intervals, I have kept the book-unity always in mind ... with reference to its effect as part of a whole.”
—Edgar Allan Poe (1809–1849)
“There is something terribly wrong with a culture inebriated by noise and gregariousness.”
—George Steiner (b. 1929)