Active Noise Cancellation (ANC) and Engine Sound Enhancement (ESE) nowadays are proven standard technologies for low frequency engine noise reduction and sound quality enhancement for conventional as well as modern electric and hybrid electric powertrains. They make use of audio system components to generate the required acoustical output to the vehicle interior. As these technologies define the acoustical character and attributes of the vehicle and its powertrain, their application and the resulting sound must not depend on the actual vehicle audio system level. Therefore, integration of these technologies within the vehicle head-unit, which is typically independent of the actual audio level, is a preferred solution to reduce overall system development and integration complexity. This integration strategy has been strongly supported by the inclusion of freely programmable, open DSP cores within a radio-audio one-chip as e.g. the NXP Dirana3. Currently the next generation of such radio-audio one-chip becomes available. They show significant changes on their open DSP cores which are used for ANC and ESE processing, including newer generation of DSP cores and significant changes on the memory availability and layout. This paper analyses and discusses the impact of the new generation of tuner System-on-Chips (SoCs) on the actual ANC and ESE performance in production vehicles, based on existing software implementations and with a strong focus on the additional system capabilities that will become available for NVH noise management engineers in terms of system flexibility and sound options.
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