On the impact of next generation of automotive radio tuners on Active Noise Cancellation and Engine Sound Enhancement system capabilities 2019-01-1570
Active Noise Cancellation and Engine Sound Enhancement 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 radio tuner and audio SoCs as e.g. the NXP Dirana 3.
Currently the next generation of such radio tuner and audio SoCs 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 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.
Stefan Kerber, Rolf Schirmacher PhD, Katharina Schmidt, Rita Reger, Qian Ni lng
Müller-BBM Active Sound Technology GmbH, NXP Semiconductors
Noise and Vibration Conference & Exhibition