Reduction of Noise from Construction Machines with Particular Reference to Cooling Systems

It has been found that on many conventional construction machines, the cooling system is the major noise source. Design parameters for quiet and efficient cooling systems are explained; they show the importance of matching the various elements of the system. It is illustrated that, in practice, very minor changes to cooling systems to improve the match, coupled with other fundamental noise reduction techniques, can result in considerable reductions in noise.

Reference is also made to possible future trends in minimizing cooling system duty by use of new materials to reduce engine heat rejection.