I have the Sennheiser HD580's and do a lot of business travel where I have tried using these. Since a jet makes so much noise, if I turn it up to the point where my neighbor can hear, it is probably too loud for my own hearing. I am looking at switching to etymotic ear buds with a much higher level of noise isolation. http://www.headphone.com/layout.php?topicID=3&subTopicID=26
