On 4/27/2006 at 3:02 PM jim stephens wrote:
It was not that noisy, but definitely busy. They had
the stick man
walking the
dog program running on the console lights of one of the
168's.
Noise is funny stuff. I remember at CDC, many people complained about the
noise in the machine room. Eventually, they brought in a guy with a sound
meter who said that the noise wasn't terrible--about 83 dB, measured, I
think at 1000 Hz. Now, if this was a typewriter generating that 83 dB, I
probably wouldn't have had a problem. But this was "white" noise--the
collective noise of the tape drive vacuum pumps, all of the forced-air
cooling, etc. The machines themselves were very quiet--they were cooled
with a chilled-water heat exchanger, so there was no forced-air noise. The
line printers were pretty well insulated, too. The card readers were loud,
but they didn't run all of the time--and no one used the card punch.
But put in 8 hours in a room full of white noise, and you find yourself
getting jittery and irritable. I found that doing my serious thinking
oustide of the machine room was very effective. The big problem was that
some idiot would drift by and see an unattended machine and try to run his
"little job", thereby screwing up your debugging efforts. Signs
threatening bodily harm if were very useful when placed on what looked to
be an idle system...
To this day, I can't stand a PC with a fan that's much louder than barely
audible.
Cheers,
Chuck