[Greg Locock]

wrote in news:1189944817.872694.250160@
22g2000hsm.googlegroups.com:


No, you, in fact, said:

"Such as the entire cabin of a passenger aircraft, "

Which cabin of which passenger aircraft has one source?




What I wrote was

"
One of the very early demonstrations of active noise cancellation used a
single source cancelling a ship's exhaust noise.

I have instaled mics on the outside of a car, and demonstrated
cancellation of exhaust noise. Not a generally useul technique, but it
worked.

Finally, anc was used to cancel prop noise inside an aircraft's cabin.

"

That does NOT say that the aircraft cancellation system was single
source.

Cheers

Greg Locock