I live close to an airport and have to deal with the sounds of jets
taking off all the time when I'm in my yard. Is there outdoor noise
cancelling technology like those available in some headphones? Where
can I find these?

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Clarification of Question by darrenlu-ga on 25 Nov 2005 20:45 PST

I'm looking for non-headphone solutions that would cancel jet noises
for everyone in the yard. Something more akin to noise cancelling
speakers.

This may be of interest to you:

http://www.prosoundweb.com/install/spotlight/jets.shtml

The Bose QuietComfort? Acoustic Noise Cancelling® Headset

I've tried these out at the Bose store in my local mall, and it
canceled most of the sound coming from the mall itself.  I want a pair
myself.

http://www.thetravelinsider.info/7dec2001.htm

Hi darrenlu-ga,

   If you are looking for an inexpensive solution, You can extend the
concept of a noise cancelling headset, to make an active noise cancelling
device that could cover open space.  You might want to replace the pickup
microphones on the headset with more sensitive and directional microphones,
and hookup the headset outputs to a high powered stereo amp/external speakers.
Incase if you want to reduce the noise indoors, you may want to add some
filter to cut down the wind noise, reproduce the sound through wireless speakers
that you can carry around.

Regards
ldavinci-ga