I've used a commercial set (NRT?), advertised in QST, etc. They are very
effect in reducing noise, but there are a couple problems. The audio response
seems to have a big peak at very low frequencies, though an audio filter
should eliminate it. More seriously, in order to be effective they have to
fit very tightly on your head. After a couple hours, that gets very
uncomfortable and hot. When I can't stand it any longer, I switch to a
conventional headset, until I can't stand THAT any longer. However, even if I
only wear the noise-cancelling headset half the time, my ears don't ring
nearly as much when the contest is over.
73, Scott K9MA
--
Scott Ellington
Madison, Wisconsin USA
sdelling@facstaff.wisc.edu
--
CQ-Contest on WWW: http://www.contesting.com/_cq-contest/
Administrative requests: cq-contest-REQUEST@contesting.com
|