My iPhone and my Sennheiser noise cancelling headphones are not playing nicely. Periodically, I get an annoying buzzing/interference noise when I'm listening to music on my iPhone and have noise cancellation switched on. [more inside]
posted by kathryn on Aug 7, 2007 - 11 answers

Are active noise cancelling headphones safe for your hearing? [more inside]
posted by spacewrench on Jun 26, 2007 - 14 answers

My recent experience at work has led me to wonder whether there is any sort of personal noise cancellation gun? I envision a device or appliance that you can point at someone obnoxious to negate them using noise cancellation technology.
posted by mert on Aug 19, 2004 - 10 answers