Measurement and Diagnosis of the Noise from a General Electric C36-7 Diesel Electric Locomotive

PDFTech ReportBBN-4167DOT-TSC-FRA-79-26Acoustic measuring instrumentsAcousticsCooling systemsDiesel electric locomotivesEngine idlingFansNoisePower spectraRailroad facilitiesRecording instrumentsSound levelTransfer functionsUnited StatesUnited States. Federal Railroad AdministrationRemington, Paul J.Alakel, M. N.Dixon, N. R.Bolt, Beranek, and Newman, inc.John A. Volpe National Transportation Systems Center, (U.S.)United States. Federal Railroad AdministrationAGR-IMPACTS-EnvironmentAGR-IMPACTS-ExportsNTL-RAIL TRANSPORTATION-RAIL TRANSPORTATIONNTL-RAIL TRANSPORTATION-Rail Energy and EnvironmentNTL-SAFETY AND SECURITY-Vehicle DesignNTL-SAFETY AND SECURITY-Rail SafetyNTL-ENERGY AND ENVIRONMENT-Rail Energy and EnvironmentNTL-ENERGY AND ENVIRONMENT-ENERGY AND ENVIRONMENTVolpe National Transportation Systems Center, Technical Reference CenterMeasurements of the noise from a General Electric C36-7 diesel electric locomotive were performed with the locomotive stationary and attached to a load cell during powered and unpowered pass-by tests. The pass-by tests demonstrated that wheel/rail noise contributes little to both interior and wayside noise when the locomotive is operating under load at throttle 8. Stationary tests examined the directivity of noise around the locomotive and the contribution of the major sources to the noise signature. At throttle 8, under load and at idle, the exhaust and radiator cooling fan were the primary sources. At throttle 8, unloaded, the radiator cooling fan exhaust and equipment blower dominated the noise