Does Turbocharging Increase Diesel Engine Noise? — Observations on the Generation, Emission and Reduction of Diesel Engine Noise

The basic thermodynamic and operating advantages of using turbocharging with diesel engines are summarized and the question is posed as to whether turbocharging is the best method from an acoustic point of view. The generation, transmission, and radiation of noise in turbocharged engines are described and the interaction of the reciprocating engine and turbocharging system is discussed. An indication is given as to how acoustic improvements are possible by taking suitable measures at the drawing board. The conclusion is drawn that for increases in output, turbocharging is the most favorable method for creating a “quiet engine.”