On 1/7/2020 11:47 AM, jimlux wrote:
Next time someone asks me about how NEC works, I'll just point them to
Pocklington's paper.<grin>
The earliest published work on the "precedence" effect in acoustics was
by Joseph Henry c.a. 1850 (THAT Joseph Henry, whose name is on the unit
of inductance). It's the basis of the Bell Labs patent for stereo c.a.
1936, a method far superior to the one published in the UK in the same
time frame. Henry was heavy duty in science in those days -- he
consulted on the acoustic design of the meeting rooms of the houses of
congress, and on acoustic propagation of sound from foghorns. He was
first director of the Smithsonian; the government closed for the day he
died and the day of his funeral! We could use that sort of respect for
science today. :)
References and discussion here. http://k9yc.com/AES-StereoASGWeb.pdf
Precedence effect is now most commonly called the "Haas Effect" as the
result of a graduate-level paper published by Helmutt Haas nearly a
century after Henry.
73, Jim K9YC
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