Has anyone tried listening to binaural beats to mask the
harshness of the hum?
I made an hour long recording of the hum I hear - only I
made it synchronous at about 3Hz and just loud enough to
mask out the randomness of the environmental hum. It works
for me! Maybe it works so well because I know the base
frequency of our hum and can match it.
Anyone interested can search the web. There's a Cool
Edit manual called coolman.pdf which explains entrainment
and binaural beat usage starting on page 64.
Combating environmental hum is not one of the recommended
uses though but 'sleep' is.
Some may have an aversion against pure tones with out over
tones (not sure why) so I wouldn't recommend it there.
Also B.B.s might not work on those who hear in one ear.
I used a free program called Csound to make my B-Beats
but I'm fairly sure Audacity, Cool Edit, and other
programs will easily do the job. Of course you have
to get your sounds onto a player of some sort in order
to try this. A laptop and headphones should work as
long as the fans aren't too loud.