"High-speed trains gliding along with magnetic levitation look as if they should be sleek and silent. But not so, according to a new study. Magnetically levitated (maglev) trains might cause more noise pollution than today's intercity trains, says a report by Joos Vos, of the Dutch research institute TNO Human Factors, Soesterberg, in the Journal of the Acoustical Society of America." (Quoted from article)