At this year's CIMAC conference Wärtsilä presented a paper on noise reduction of medium speed engines. Changes made to the crankcase covers and camshaft covers brought the emitted sound level down by approximately 6dB(A). A multi-layer sandwich solution applied to the turbocharger casing and charge air cooler reduced noise levels 5dB(A). Engine noise emanating from th was reduced by placing an additional covering on top of the existing cylinder head valve covers. It is proposed that these optional parts will be available for current and future Wärtsilä medium speed engines providing a noise reduction of approximately 5dB(A). [More]