Active noise control in a duct system based on a frequency-estimation algorithm and the FX-LMS algorithm

Kim, E. Y.; Kim, B. H.; Lee, S. K.

doi:10.1007/s12239-013-0033-z

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…The performance of the adaptive notch filter to cancel a sinusoidal signal depends heavily on the accuracy of the frequency of the reference signal [16] since the center frequency of the notch filter depends on the sinusoidal reference signal, whose frequency is equal to the frequency of the sinusoidal noise to be cancelled. The increment of step size μ results in a stability problem because, in an adaptive notch filter, the convergence step size is proportional to the bandwidth of the filter [9,15] and the higher the step size, the higher the bandwidth. Considering stability, the optimal step size is proposed [7] as follows: The adaptive notch filter removes the primary spectral components within a narrow band centered at the frequency f k i (t) of the reference signal.…”

Section: Conventional Methods For Anc Of Engine Noisementioning

confidence: 99%

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A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

Lee

Back

et al. 2018

Applied Sciences

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This paper presents a novel active noise cancellation (ANC) method to reduce the engine noise inside the cabin of a car. During the last three decades, many methods have been developed for the active control of a quasi-stationary narrowband sinusoidal signal. However, since the interior noise signal is non-stationary with a fast frequency variation when the car accelerates rapidly, these methods cannot stably reduce the interior noise. The proposed method can reduce the interior noise stably even if the speed of the car is changed quickly. The method uses an adaptive filter with an optimal weight vector for the active control of such an engine noise. The method of determining the optimal weight vector of an adaptive filter is demonstrated. In order to validate the advantages of the proposed method, a conventional method and the proposed method are simulated with three synthesized signals. Finally, the proposed method is applied to the cancellation of booming noise in a sport utility vehicle. We demonstrate that the performance of the ANC system with the proposed algorithm is excellent for the attenuation of engine noise inside the cabin of a car.

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Section: Conventional Methods For Anc Of Engine Noisementioning

confidence: 99%

“…The performance of the adaptive notch filter depends heavily on the accuracy of the frequency of the reference signal because the bandwidth of the adaptive notch filter is proportional to the convergence step size [14,15]. The frequency change of the reference signal deteriorates the performance of an ANC system [16].…”

Section: Introductionmentioning

confidence: 99%

A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

Lee

Back

et al. 2018

Applied Sciences

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“…The FxLMS algorithm is an active noise control method. The secondary channel composed of a loudspeaker and error sensor is used in the FxLMS algorithm [ 15 , 27 ]. The input reference signal is processed to get the control signal.…”

Section: Related Workmentioning

confidence: 99%

Indoor Acoustic Signals Enhanced Algorithm and Visualization Analysis

Yan

Luo

Sun

et al. 2021

Computational Intelligence and Neuroscience

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A pure acoustic signal can be easy to realize signal analysis and feature extraction. However, the surrounding noises will affect the content of acoustic signals as well as auditory fatigue to the audience. Therefore, it is vital to overcome the problem of noises that affect the acoustic signal. An indoor acoustic signal enhanced method based on image source (IS) method, filtered-x least mean square (FxLMS) algorithm, and the combination of Delaunay triangulation and fuzzy c-means (FCM) clustering algorithm is proposed. In the first stage of the proposed system, the IS method was used to simulate indoor impulse response. Next, the FxLMS algorithm was used to reduce the acoustic signals with noise. Lastly, the quiet areas are optimized and visualized by combining the Delaunay triangulation and FCM clustering algorithm. The experimental analysis results on the proposed system show that better noise reduction can be achieved than the most widely used least mean square algorithm. Visualization was validated with an intuitive understanding of the indoor sound field distribution and the quiet areas.

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“…As shown in Figure 10, the data were measured by using the LMS Mobile system with 32 channels 8 . Each analogue signal was converted to a digital signal, and the data were processed using Matlab software.…”

Section: Data Processing and Analysismentioning

confidence: 99%

Identification of the contribution of a coherent vibration source in a gasoline direct-injection engine using a two-input single-output model

CHOI

Jang

Lee

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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Identification of the contributions of vibration sources in a gasoline direct-injection (GDI) engine is important in order to reduce the vibration of the gasoline direct-injection engine components. A multiple-input single-output system is identified by using the coherence method. In this paper, the contributions of vibration sources in a gasoline direct-injection engine are identified by simulating a two-input single-output model. The partial and ordinary coherence functions between the two inputs and the single output are applied to identify the contributions of the two inputs to the output. In order to evaluate the proposed method, a preliminary test was performed using a laboratory test rig. The results show that the model can be used to identify the contribution of each input to the output. Furthermore, this model is applied for identification of the vibration source in a gasoline direct-injection engine.

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Active noise control in a duct system based on a frequency-estimation algorithm and the FX-LMS algorithm

Cited by 11 publications

References 5 publications

A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

A New Method for Active Cancellation of Engine Order Noise in a Passenger Car

Indoor Acoustic Signals Enhanced Algorithm and Visualization Analysis

Identification of the contribution of a coherent vibration source in a gasoline direct-injection engine using a two-input single-output model

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