Error Microphone Placement Optimization for Concurrent MIMO Feedback ANC Systems

Christian, Jonathan H.; Stafford, Dylan

doi:10.4271/2017-01-1828

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Meanwhile, for concurrent control, the previous study presented error microphone positioning [37] to identify the optimal layout of error microphones, leading to optimal noise suppression in EHC and RNC. In that study, the ANC performance was evaluated by constructing various microphone layouts.…”

Section: Discussionmentioning

confidence: 99%

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Kim

Altınsoy

2022

IEEE Access

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This study shows that a concurrent active noise control strategy for engine harmonics and road noise has a complementary effect. In particular, we found that engine booming noise is additionally attenuated when road noise control is concurrently used with engine harmonics control; an additional attenuation of 2.08 dB and 1.25 dB for the C1.5 and C2.0 orders, respectively, was achieved. A parallel multichannel feedforward controller for non-stationary narrowband engine harmonics and broadband road noise was designed and implemented to reduce noise in all four seats. Two control signals were considered independent because the reference signals, engine revolution speed for the engine harmonic controller, and acceleration signal for the road noise controller are uncorrelated. However, if the reference sensor for the road noise controller is installed along the overlapping transfer path between the engine noise and road noise, the engine noise may also be suppressed by the control signal for the road noise attenuation. Based on transfer path analyses for both engine harmonics and road noise, the optimal positions for the reference sensors were selected. In addition, we identified several overlapping transfer paths between the engine booming noise and road noise. A practical active noise control system combined with a remote microphone technique was implemented for a large six-cylinder sedan using a vehicle audio system to evaluate the noise attenuation performance. The experiments showed that the interior noise from the engine and road excitation was effectively suppressed by the proposed concurrent control strategy.

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Section: Discussionmentioning

confidence: 99%

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Kim

Altınsoy

2022

IEEE Access

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Development of active noise control simulation with virtual controller based on computational aeroacoustics

Kim

Saravanan

Kim

et al. 2023

The Journal of the Acoustical Society of America

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Noise reduction and control research are actively conducted as increasing noise problems compel the stringent noise requirement. Active noise control (ANC) is constructively used in various applications to reduce low-frequency noise. In previous studies, ANC systems were designed based on experiments, requiring extensive effort for effective implementation. In this paper, a real-time ANC simulation in a computational aeroacoustics framework based on the virtual-controller method is presented. The aims are to investigate sound field changes following ANC system operation and gain more insight into ANC system design through a computational approach. Using a virtual-controller ANC simulation, the approximate shape of the acoustic path filter and changes in the sound field when ANC is either “on” or “off” at the target domain can be obtained, enabling practical and detailed analyses. Then, the computational results of the duct and open space cases are predicted and compared with the experimental results to validate the prediction capability of the proposed method. In addition, the ANC system design parameters and their effects on sound fields with unintended phenomena can be predicted. Through case studies, the ability to design, optimize, and predict the performance of the ANC system using the computational method is also demonstrated.

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Error Microphone Placement Optimization for Concurrent MIMO Feedback ANC Systems

Cited by 2 publications

References 10 publications

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

A Complementary Effect in Active Control of Powertrain and Road Noise in the Vehicle Interior

Development of active noise control simulation with virtual controller based on computational aeroacoustics

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