Noise is also reduced massively: http://www.bdl.aero/media/filer_public/46/16/4616cefd-aa12-4589-bf2c-954e8683427c/boeing-737-series-development-of-noise-emiss

Noise is also reduced massively: http://www.bdl.aero/media/filer_public/46/16/4616cefd-aa12-4589-bf2c-954e8683427c/boeing-737-series-development-of-noise-emissions.png http://www.bdl.aero/media/filer_public/46/16/4616cefd-aa12-4... Comparing 1960s 737 vs 1990s 737. And 787 or here: http://www.airbus.com/fileadmin/media_gallery/photogallery/big/800x600_1371620370_A380_noise_footprint_at_CDG_-_take_off.JPG http://www.airbus.com/fileadmin/media_gallery/photogallery/b... a380 with hushkit compared to 747-400 (first flight 1989)