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This paper summarizes the techniques and guidelines which were used to reduce the driver perceived noise level of a 145-210 HP series of agricultural tractors. Graphs of case study test results and comments on subjective noise quality are provided to guide the acoustic novice through the complexities of the vehicle sound environment in a methodical problem solving format.

Ford New Holland has developed a complete new line of agricultural tractors consisting of six models with modern styling and performance features and the necessary variants to satisfy worldwide markets. The key ingredients of the developmental program were Best in Class features in performance and fitness for use for improved reliability, durability, serviceability and safety to achieve industry leadership in overall customer satisfaction.