Time-domain Kalman filter for active noise cancellation headphones

Liebich, Stefan; Fabry, Johannes; Jax, Peter; Vary, Peter

doi:10.23919/eusipco.2017.8081276

Cited by 26 publications

(27 citation statements)

References 9 publications

(10 reference statements)

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“…The acoustic loads coupled with the headphone and acoustic effects constitute the main signal processing challenges of ANC algorithms. 36 Compromises may be necessary related to the size of the loudspeaker, the energy consumption, and the capacity of the ANC system. Advanced technology, such as a deep learning model for ANC, to expand the capacity of the ANC function to achieve real-time implementation of ANC headphones in audiometric tasks will be a focus of future work.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the hearing screening effectiveness of active noise cancellation technology among young adults-A pilot study

Cheng

Han

Lee

et al. 2022

Journal of the Chinese Medical Association

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Hearing is a critical function for human communication, and when hearing loss occurs, it directly affects the quality of life. A previous study showed that the global prevalence of hearing loss accounted for one in five people in 2019, and a 56.1% increase is expected by 2050 along with a corresponding increase in hearing-impairment-associated disability. [1][2][3] These numbers indicate that globally, the proportion of hearing-impaired people increases every year, and more research resources focused on this population are needed.There are many factors (e.g., noise-induced hearing loss, ototoxicity, and idiopathic sudden sensorineural hearing loss) that cause hearing loss in patients; 4-6 meanwhile, a World Health Organization report has shown that over 1 billion young adults are at risk of permanent hearing loss due to unsafe listening practices. Therefore, a device that could allow hearing screening to be performed at any time would be valuable because of its ability to effectively support early treatment. [7][8][9][10][11] Classical hearing screening approaches, such as pure tone audiometry, are currently most often used to diagnose the hearing ability of

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Section: Discussionmentioning

confidence: 99%

Evaluating the hearing screening effectiveness of active noise cancellation technology among young adults-A pilot study

Cheng

Han

Lee

et al. 2022

Journal of the Chinese Medical Association

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“…For example, if the background noise is louder than the acoustic source, it is difficult for the system to localize the acoustic source without a sophisticated noise filtering method. We are currently improving the accuracy of ball position estimation by integrating an active noise cancellation [21] and a room sound wave reflect-aware scheme [22] in the existing system.…”

Section: Discussionmentioning

confidence: 99%

Screen-Based Sports Simulation Using Acoustic Source Localization

et al. 2019

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In this paper, we introduce a novel acoustic source localization in a three-dimensional (3D) space, based on a direction estimation technique. Assuming an acoustic source at a distance from adjacent microphones, its waves spread in a planar form called a planar wavefront. In our system, the directions and steering angles between the acoustic source and the microphone array are estimated based on a planar wavefront model using a delay and sum beamforming (DSBF) system and an array of two-dimensional (2D) microelectromechanical system (MEMS) microphones. The proposed system is designed with parallel processing hardware for real-time performance and implemented using a cost-effective field programmable gate array (FPGA) and a micro control unit (MCU). As shown in the experimental results, the localization errors of the proposed system were less than 3 cm when an impulsive acoustic source was generated over 1 m away from the microphone array, which is comparable to a position-based system with reduced computational complexity. On the basis of the high accuracy and real-time performance of localizing an impulsive acoustic source, such as striking a ball, the proposed system can be applied to screen-based sports simulation.

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“…Improper choice of Q and R may influence the performance of the filter method. Many estimation methods have been proposed to determine Q and R in the filter process (e.g., Akhlaghi et al 2017;Basso et al 2017;Ding et al 2007;Liebich et al 2017;Saho and Masugi 2015). With the use of adaptive filtering approach, we estimate Q and R , and it can be expressed as (Akhlaghi et al 2017) where ε(k) = Y (k) − HX(k|k) is the difference between the observed value and estimated one.…”

Section: Adaptive Kalman Filtermentioning

confidence: 99%

A reduction method for magnetic disturbance caused by DC railway system

Ding

et al. 2021

Earth Planets Space

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The stray current of direct current (DC) railway systems causes magnetic disturbance in geomagnetic measurements, which may complicate the identification of useful information. The magnetic disturbance exhibits broadband characteristics in the frequency domain. In this paper, we propose a noise reduction method based on the adaptive Kalman filter to extract useful signals from the geomagnetic data with a high level of noise. The covariance matrixes of both the process noise (Q) and measurement noise (R) can be adaptively estimated to improve the performance of the adaptive Kalman filter. The proposed method is adopted to process the geomagnetic data collected at the Beijing Geomagnetic Observatory (BJI), which is affected by the DC railway system. The magnetic disturbance is largely reduced, and the signal-to-noise ratios of the horizontal and vertical components of the geomagnetic field are improved by more than 14 dB and 27 dB, respectively. The K-indices are calculated to evaluate the performance of the adaptive Kalman filter method. To assess the influence of the adaptive Kalman filter on natural signals, the geomagnetic data that contain rapid variations are processed. The denoising results show that the adaptive Kalman filter can effectively reduce the magnetic disturbance caused by DC railway system without large impact on the natural geomagnetic rapid variations.

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Time-domain Kalman filter for active noise cancellation headphones

Cited by 26 publications

References 9 publications

Evaluating the hearing screening effectiveness of active noise cancellation technology among young adults-A pilot study

Evaluating the hearing screening effectiveness of active noise cancellation technology among young adults-A pilot study

Screen-Based Sports Simulation Using Acoustic Source Localization

A reduction method for magnetic disturbance caused by DC railway system

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