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The NVH performance of today's automobiles has been improved to levels where common user can easily perceive the issues related to sound quality inside the passenger compartment. With NVH development resulting in quieter and quieter driving conditions, the importance of better acoustic in car-entertainment has been improved by 2-3 notches. The focus of this paper is further concentrated on the methodology to evaluate and optimize speaker location in a MPV. The speaker location was optimized for its location inside passenger compartment and its mounting characteristics. Two different configurations of speaker fitment locations for different seating patterns were tested in vehicle. Frequency Response Function and sound quality parameters were measured experimentally and calculated using sound quality algorithm respectively.

One of the primary excitation sources in a passenger car comes from the powertrain [1]. Refinement of powertrain induced noise is the most critical tasks during a vehicle refinement. Due to ever increasing demand for reduced design and development cycle, most critical decisions have to be made at the concept stage. Powertrain radiated noise is one of the most important performance factor that must be evaluated during the concept stage. Solution time for calculating the radiated noise using the existing acoustic solvers is very high and requires very expensive resources like software and hardware. Arriving the optimal design with conventional method is very tedious job. A new method has been adopted for identifying the critical areas and coming up with the optimal design modifications within a short span of time. Powertrain radiated noise has been calculated with the help of acoustic solver.