A compound secondary source for active noise radiation control

Chen, Weisong; Pu, Hongjie; Qiu, Xiaojun

doi:10.1016/j.apacoust.2009.08.008

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…The control of the directivity pattern positively affects noise control by the superposition of a sound with the same waveform and inverse phase to the noise (Kido, 1991). It has been shown that compound sources can be used to substitute the monopole sources to reduce the number of control channels of an ANC system (Weisong et al, 2010). An equalization model (Hill, Hawksford, 2010) consisting of multiple low-frequency components driven each by a dedicated signal adjustable to amplitude and phase, can adapt itself to its surroundings to give equal low-frequency coverage within a defined listening area.…”

Section: Compound Sound Sources In Ancmentioning

confidence: 99%

“…A numerical study on the types of sec-ondary sources for sound radiation control concluded that arrays of monopoles are suitable for controlling a primary source, which is either large or time-variant and not fully defined (Qiu, Hansen, 2000). An ANC system with multiple compound secondary sources, consisting of two closely monopoles near to the primary source, was proposed by Weisong et al (2010).…”

Section: Introductionmentioning

confidence: 99%

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Archives of Acoustics

Giouvanakis

Sevastiadis

Papanikolaou

2019

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A novel method of active noise control using adaptive radiation sound sources is investigated. A finite element model of a modal enclosed sound field is excited harmonically, representing a noise field in the low-frequency range. The control sources are comprised of elementary dipole sources for which the driving signals are adjusted by an optimization method. Two set-up cases of the proposed compound sources are investigated. The coupling of the control sources with the modal sound field is discussed. The simulated performance of the proposed method is compared with that of a system with distributed simple sources and the results show the effectiveness of the sources with adaptive radiation for active noise control in small enclosures.

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Section: Compound Sound Sources In Ancmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Giouvanakis

Sevastiadis

Papanikolaou

2019

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“…An active noise barrier prototype developed by Borchi et al was able to operate in a stationary, almost pure tone, low-frequency noise environment effectively, and the prototype could obtain a peak insertion loss of about 15 dB [12]. The results of many studies show that the location of the loudspeaker (additional source/secondary source) and the microphone (error sensor) are important factors affecting the performance of the active noise barrier [13][14][15][16][17], in addition to the number of the controllers [18]. The sound attenuation caused by the active noise control system is only significant when the system is optimally arranged; otherwise, the active control system may be ineffective or even reduce the insertion loss of the barrier.…”

Section: Introductionmentioning

confidence: 99%

Research on the Arrangement of Additional Source for Large Space Protection of an Active Noise Barrier

Wang,

Chang,

Chen

et al. 2024

Applied Sciences

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When active noise control technology is applied to traffic noise control, additional sources are often added to the facade of the barrier, and error sensors are placed in the protected area. The noise reduction effect in the area without error sensors is often ignored. In this paper, the effect of the additional source configuration on the sound field in the space without error sensors is researched. By analyzing the directivity and distribution of the sound field at the top of the barrier under various conditions, it is believed that the optimal location of the additional source is related to the height of the primary source and the barrier. An approximate model is established to evaluate the optimal location of the additional source for achieving a good noise reduction effect in a large space. Experiments are also carried out to verify the model. The conclusions are beneficial for improving the noise reduction effect in the area higher than the barrier and without error microphones.

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“…Also, compound sound sources have been utilized in noise control systems. As the energy radiation pattern of the compound source may be similar to that of the noise field, the secondary monopole sources can be substituted with the result of reducing the number of channels in a control system (Chen et al, 2010). ANC is implemented widely in enclosures or structures (Wrona, Pawelczyk, 2016).…”

Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Giouvanakis

Sevastiadis

Papanikolaou

2021

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The proposed compound sound sources for low-frequency noise control applications are composed of dipole sources. Their spatial radiation, which is critical in the modal field of small, closed spaces, is intended to be controlled with independent driving signals of each dipole. The need for small and efficient low-frequency elementary monopole sources led to the proposed vented sub-woofer loudspeaker design with low force factor (low-Bl) drivers. The investigated sources are set up in quadrupole configurations and measured in terms of polar near field response patterns to verify the theoretical predictions. The measurement results consist of the validation of the proposed compound sound sources on the implementation of active noise control problems in the low-frequency range. Also, their small size and modular construction make them interesting for use in other applications.

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A compound secondary source for active noise radiation control

Cited by 13 publications

References 13 publications

Archives of Acoustics

Archives of Acoustics

Research on the Arrangement of Additional Source for Large Space Protection of an Active Noise Barrier

Archives of Acoustics

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