I posted a few weeks ago regarding the edsets adapter I ordered so I can use ear buds with the intercom. The adapter works fine but I used a set of ear buds my wife uses with her mp3 player. The ticking of the engine noise was so loud it was unbearable. Well today I went to wal mart and bought a pair of KOSS noise isolating earbuds for $24.88. There is absolutely no engine noise in these earbuds. I never thought that the type of earbuds would make a difference. There is one aggravating thing about the KOSS earbuds. One earbud has a wire that is 6" long and the other earbud wire is 22" long. Why is this?