Exterior Truck Noise Measurements on Turbocharger Retrofit
760549
02/01/1976
- Event
- Content
- Exterior noise level measurements were conducted on a typical in-service diesel engine heavy duty truck to determine the noise level reduction resulting from a turbocharger retrofit. The tests were conducted in accordance with procedures recommended by the Society of Automotive Engineers and the United States Department of Transportation. Overall noise level measurements and a narrow-band spectrum analysis indicate that a significant noise level reduction is obtained from the installation of a turbocharger kit. The lower noise level is the result of a smoother pressure development during combustion. The narrow-band analysis shows a significant amplitude reduction at the engine firing frequency and a general decrease in noise energy over the whole frequency range.
- Pages
- 8
- Citation
- Pisarski, J., "Exterior Truck Noise Measurements on Turbocharger Retrofit," SAE Technical Paper 760549, 1976, https://doi.org/10.4271/760549.