Abstract
Automotive component suppliers are often called on to supply components which meet very vague requirements such as no audible noise from component. As odd as this might seem, this type of specification usually has a number associated with it. This number could be the measured A-frequency weighted sound pressure level, the total loudness, some averaged band sound pressure level, or even a vibration response level. The irony comes from the fact that most of these components do not generate noises on their own but only when subjected to intense vibration. To deal with this, component suppliers must somehow construct a measurement system which will capture these squeaks and rattles as the component is vibrated. This paper describes a measurement system and method for evaluating the noises generated by automobile steering columns. Descriptions are given of the various vibration inputs used, the equipment required, and the parameters measured.
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