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This article presents a discussion on the behavior and visualization of structural vibration transfer and structure borne noise in an automotive turbocharger. Structural vibrations are generated in a turbocharger due to various rotor modes and imbalance present in rotating assembly (rotor-bearing system) which are further transferred to vehicle components through different transfer paths. Along the vibration transfer path, this excitation may be radiated as noise by some sensitive vehicle components in specific frequency ranges. This behavior is captured and analyzed using acoustic source localization techniques by means of a commercially available tool that implements beam forming technique and acoustic holography.
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