It is well known that noise control at the source is the most cost-effective. Designing for quietness is therefore the most important concept in engineering acoustics or technical acoustics. This volume covers a large number of applications, such as silencers, lined ducts, acoustic materials, source characterization, acoustical design of vehicle cabs, ships, space antennas, MEMS pressure transducer, active control of structure-borne noise and cavities, SEA for engine noise and structural acoustic modelling with application to design of quieter panels.