Dear Jim,
Bruel and Kjaer http://www.bk.dk/; has over the years published a lot of
articles
on these kind of tests. In many cases they wrote or drove the test method
and/or
the standard. You can enquire of them what technical articles they have on
test
methods. They have offices around the world
James,
What is the product that you are interested in? There are quite a few
standards that deal with product noise measurements, not all use the
same measurement distance. Many use sound power, which is independent
of distance.
Lyle Luttrell
Regulatory /Reliability Engineer
Breece Hill
James,
John Downs of dB Sound Labs has always been able to answer those types of
questions for me. You might try giving him a call. His contact info is
shown below...
John Downs
Sr. Staff Engineer
(760) 940-4216
Fax: (760) 940-6321
412 Hillway Drive
Vista, Ca. 92084-6342
--
Sincerely,
James,
I believe the standard you want is ISO 7779 Measurement of airborne noise
emitted by computer and business equipment. In a past life I had to use this
standard and in it are specific measurement criteria. Some criteria from
memory
are number and placement of microphones,
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