Application of multi-channel hybrid active noise control systems for infant incubators

Liu, Lichuan; Beemanpally, Kaplia; Kuo, Sen M.

doi:10.3397/1.3702015

Cited by 11 publications

(3 citation statements)

References 16 publications

(22 reference statements)

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“…Recently some unique applications have been developed such as for reducing snore noise [1], quieting infant incubators [2] and protecting human ears from MRI (Magnetic Resonance Imaging) noise [3]. The author et al have been developing AAS-Window (Active Acoustic Shielding) which is an open wind without transmitting sound [4].…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of voice shutter

Nishimura

2013

2013 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference

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Telephone voice is annoying in public spaces like trains and cafés. The speaking voice was tried to be attenuated by using an active noise control technique. It is called 'Voice Shutter'. Two types of voice shutter, which are open type and closed type, are proposed in this paper. A closed type voice shutter controlled by a feed forward method was manufactured and tested. As the results, the voice shutter was proved to be feasible, although it was too large for practical use, in this stage.

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Section: Introductionmentioning

confidence: 99%

Feasibility study of voice shutter

Nishimura

2013

2013 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference

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“…In order to improve the noise reduction performance of the ANC system, many corresponding adaptive algorithms have been developed and achieved great success. Kuo and Liu discussed the effectiveness of filtered-x least mean-squares (FxLMS) to cancel both the outside and inside noises of infant incubators in a real NICU environment, and they obtained an average reduction of 13 dB and 17 dB [1,2]. Mylonas developed a simple, robust and computationally efficient virtual sensing FxLMS algorithm and tested it in a cabin mock-up [3].…”

Section: Introductionmentioning

confidence: 99%

A New Proportionate Filtered-x RLS Algorithm for Active Noise Control System

Liang

Yao

Luo

et al. 2022

Sensors

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The filtered-x recursive least square (FxRLS) algorithm is widely used in the active noise control system and has achieved great success in some complex de-noising environments, such as the cabin in vehicles and aircraft. However, its performance is sensitive to some user-defined parameters such as the forgetting factor and initial gain. Once these parameters are not selected properly, the de-noising effect of FxRLS will deteriorate. Moreover, the tracking performance of FxRLS for mutation is still restricted to a certain extent. To solve the above problems, this paper proposes a new proportional FxRLS (PFxRLS) algorithm. The forgetting factor and initial gain sensitivity are successfully reduced without introducing new turning parameters. The de-noising level and tracking performance have also been improved. Moreover, the momentum technique is introduced in PFxRLS to further improve its robustness and de-noising level. To ensure stability, its convergence condition is also discussed in this paper. The effectiveness of the proposed algorithms is illustrated by simulations and experiments with different user-defined parameters and time-varying noise environments.

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“…In recent years, active noise systems (ANC) have been widely used in practical applications, such as car cabins [1,2], washing machines [3], railway train systems [4], headphones [5], infant incubators [6], motorcycle helmets [7], open windows [8], diesel generators [9], hearing aids [10], earmuff systems [11], power transformers [12], acoustic ducts [13], and traffic noise reduction [14], among others. Recently, the trend of the electronics market demands the design of portable devices in which the area is limited.…”

Section: Introductionmentioning

confidence: 99%

A Dual Adaptive Filter Spike-Based Hardware Architecture for Implementation of a New Active Noise Control Structure

et al. 2021

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Presently, the technology development trend of active noise control (ANC) systems is focused on implementing advanced adaptive filters in resource-constrained electronic appliances. Recently, several authors have proved that the use of two adaptive filter algorithms significantly improves the overall adaptive filter performance. However, the computational cost of these approaches is significantly increased since they use two filters simultaneously. Consequently, these filters cannot be implemented in these devices. To solve this problem, we propose a new ANC structure with switching selection based on filtered-x normalized least mean square (FxNLMS) and filtered-x sign least mean square (FxSLMS) algorithms to reduce the computational cost of the ANC system. The improvement of this factor has allowed us to introduce for the first time an advanced spike-based architecture, which can perform dual filter operations using dynamic routing, to be used in real ANC applications. The results have demonstrated that the computational cost of the proposed dual D-FxNLMS/SLMS algorithm is lower compared with previously reported solutions.

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Application of multi-channel hybrid active noise control systems for infant incubators

Cited by 11 publications

References 16 publications

Feasibility study of voice shutter

Feasibility study of voice shutter

A New Proportionate Filtered-x RLS Algorithm for Active Noise Control System

A Dual Adaptive Filter Spike-Based Hardware Architecture for Implementation of a New Active Noise Control Structure

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