With babble noise, the mean durations over 61 subjects were 143, ms (SD 37 ms) and 349 ms (SD 76 ms), and correspondingly with pink noise
, 130 ms (SD 32 ms) and 341 ms (SD 79 ms).
There's no shortage of catchy material on Pink Noise
Test's just-released major label debut, ``Plasticized'' (Interscope), which boasts an industrial-strength undercurrent.
Usually, I can bring a speaker to its knees at somewhere above 108 dB/1M with pink noise
or musical passages, but not the Studio100.
I monitored the direct electrical outputs by frequency using my ADC SS-525X analyzer and the Soundcraftsmen ITR-3292 test record band "Continuous All Band Pink Noise
for General EQ Use".
One eminent designer came to audition the 1A rev of the design, and before we got to any music he put on a test CD and immediately said, "Boy, listen to that pink noise
Deep bass was a little recessed, highs a little edgy, mid-bass smeared, and overall volume seemed low at any given pink noise
However, my experience has led me to believe that you can subjectively do the job just as well by using a pink noise
source and adjusting things so that the left channels of the two amps sound identical and the right channels also sound identical.
As usual, this curve was generated by measuring both speakers reproducing uncorrelated pink noise
while I slowly moved my measurement microphone over a 1 x 1 x 5 foot-wide area at roughly head height at the listening couch.
During the acoustic calibration process, the speakers will emit a series of pink noise
and timing pulses that are received by the microphone and sent to a digital equalizer for final calibration of up to seven channels.
You quickly find out this is only theoretical, however, if you run mono pink noise
through your system.
Howard Ferstler replies: I use uncorrelated pink noise
generated from one of two sources: either the one-minute segment on the Delos Surround Spectacular test disc or else the somewhat longer track on the disc produced by the Boston Audio Society.
As with the curves in Part 1, the ones printed here are the best I could achieve by positioning the speakers at optimum locations in my main room and feeding them with uncorrelated (stereo) pink noise