Methods to describe acoustic qualities of vehicles in stationary position

Abstract

Datasheets or brochures of cars or trims generally do not contain any relevant acoustic data. This is odd, because acoustic qualities of cars are getting more important for customers. From engineering point of view, this is even stranger, because a lot of engineers are working hard to understand, control and shape acoustic qualities of cars during product development. After a disappointing purchase, the author decided to explore how acoustic qualities of cars can be measured and compared by simple means. NVH in most cases cares about qualities of cars in motion, but many acoustically relevant features can be looked at in stationary position. The paper presents the motive, suggested methods of measurements and evaluation with suggested practice in the future. Measured attributes include sound isolation of the cabin, noise level of the ventilation system, cabin intimacy and response of the audio system.