Pink Noise


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Random variation in an audio signal—i.e., sound that carries no useful information about the source; pink noise has an equal amount of energy in each octave band
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The increase was larger with the louder babble noise than with the pink noise.
PHOTO Lawrence Glass, left, Peter Kelly, Kirk Hellie and Michael Hill of Pink Noise Test.
As mentioned, I listened to pink noise, too, which roared as smoothly as Niagara Falls and was unchanging as I walked about.
With pink noise, the two amps sounded absolutely identical to me.
The Trinaural signal was level-matched to the Dolby Pro Logic digital signal using pink noise.
I measure the speakers separately and together, playing both mono and "stereo" (two uncorrelated channels) pink noise.
I also measured both channels driven with mono pink noise, measured each channel one at a time, and measured the satellites separately, without the woofers, and the results were essentially the same as what I got when measuring in stereo with uncorrelated noise.
I found it easiest to adjust the woofers alone and then add the SoundPoles, using pink noise and a sound level meter at my chair as a final check.
First, the test involved pink noise, which is notoriously good at revealing frequency-response anomalies.
The remote, like so many of them, also contains functions that are not in the unit's array: muting, re-equalization (takes the "brightness" out of movie soundtracks), pink noise speaker test calibrators, and independent playback mode convenience buttons.
Pink noise can be a killer test signal in some respects, because it lacks the erratic fluctuations that music exhibits, allowing you to easily sot frequency-response differences.
I was trying to simulate the critical listening situations and variables that a high-end consumer would aim for; I even let the Fontaines play pink noise for hours one evening, because the manufacturer believes in the importance of loudspeaker break-in.