Magnetostriction is about a bulk material changing dimensionally with varying
magnetic field; this is probably not occurring or not the prime mechanism.
More likely, it's simply that the magnetic fields generate forces acting
on the currents in the coils, and the coils and neighboring structures
Back in 1974 I got a summer job as a night time computer operator for a
NCR Century-101 (32K core memory) with two 5 MB 14" Disk Drives. Most
things were on cards.
The programmer had programs that would play simple tunes on the radio if
the radio was on or very near the computer. He had about
I have seen this before, on one particular machine. The sound does appear
to come directly from the CPU. It isn't harmful as far as I can tell --
that same CPU has been testing for three years now, and continues to chug
along It only tends to happen on slower, older Pentiums, from what
Read the archives, this has been discussed 2 or 3 times before
-Original Message-
From: burlington john [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 21, 1999 19:47
To: [EMAIL PROTECTED]
Subject: Mersenne: The sound of number searching
Hello Mersenne,
Sorry for bad english its
All,
There are several things in a computer which will have their operational
parameters vary with CPU activity. The most likely ones are: audio
subsystem receiving noise coupled either directly (magnetically) into its
signal lines or via its power feed; or the load on the power regulation unit
On 22 Jul 99, at 15:24, Willmore, David wrote:
There are several things in a computer which will have their operational
parameters vary with CPU activity. The most likely ones are: audio
subsystem receiving noise coupled either directly (magnetically) into its
signal lines or via its power
At 11:35 PM 7/22/99 +0100, Brian J. Beesley wrote:
Back more or less to topic -
Oh, this is very much on topic!
when I was a computing neophyte, a
quarter of a century ago, I was told a story by an engineer working
for a major mainframe supplier. For a laugh, the development team
wired up
