In article , "Tim Wescott"
writes:

I've always seen it as 1/x sin(x) "one over ex sine ex". the hyperbolic
sine function sinh is usually pronounced "Cinch"
So how do you pronounce sinc? "Sink ?"

Yes, it's pronounced "sink", and it's quite common in signal processing.
You define it as being the _limit_ of sin(x)/x as x - 0 because otherwise
it's undefined at zero, and all the mathematicians in the crowd will curse
at you for being yet another engineer who's treating math so casually.

Heh heh heh...rememberances of my instructor throughout all math
classes except analytical geometry...same one, who also had
a HOBBY of advanced math. :-)

Instructor always warned everyone NOT to pronounce the apparent
word meaning hyperbolic sine...just say "hyperbolic" before "sine"
but write it "SinC." Someone in the class would object and then
he would write the word for hyperbolic tangent on the board and
challenge him to pronounce "TanH." :-)

Basic algebra texts explain what they are and their identities, but
some want to emulate Professor Higgins in "My Fair Lady"...i.e.,
"...they don't care what they DO, only that they pronounce it
correctly!" :-) :-) :-)

Len Anderson
retired (from regular hours) electronic engineer person