Modelling and simulation of active noise control in a small room

Aslan, Fauzi; Paurobally, Roshun

doi:10.1177/1077546316647572

Cited by 14 publications

(10 citation statements)

References 5 publications

(7 reference statements)

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“…The use of active control systems to reduce undesired propagated noise and vibration is a fairly widespread solution (Aggogeri et al, 2020; Aslan and Paurobally, 2018), especially for low-frequency disturbances. During the past two decades, this technique was investigated in several studies to improve the performance of noise barriers (Borchi et al, 2016; Huang et al, 2015; Lee et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Proper location of the transducers for an active noise barrier

Sohrabi

Gómez

Garbí

2022

Journal of Vibration and Control

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The main intention of this study is to propose general criteria for the locations of the control sources and error microphones that improve the performance of the active noise barrier. Based on the proposed criteria of this study, the greater reduction is attained when the diffracted field of the noise source is canceled with the diffracted field of the control sources, that is, it is suggested to locate the control sources on the incident side and below the path that connects the furthest point in the shadow zone to the edge of the barrier. Furthermore, it is suggested that the error microphones are most suitably placed on the shadow side of the barrier where they are under the diffracted field of both the primary and control sources. The results also show that with these general criteria, the active noise control achieves an extra reduction that varies from 14.9 to 3.9 dB (for the one-third octave bands from 63 Hz to 1 kHz) and 9.3 dB for the broadband noises.

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Section: Introductionmentioning

confidence: 99%

Proper location of the transducers for an active noise barrier

Sohrabi

Gómez

Garbí

2022

Journal of Vibration and Control

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“…Industrial activities like machinery and construction are also other environmental noise sources, which are unwanted and harmful. To date, several active (Aslan and Paurobally, 2018; Kurian et al, 2017; Peng et al, 2020; Tanaka et al, 2017; Zhang et al, 2019) and passive (De Lima et al, 2017; Kim and Lee, 2014; Liu and Li, 2020; Zhang et al, 2018) strategies are proposed to cancel or reduce these annoying sounds. Unfortunately, the vast majority of the classical approaches are designed for cases that do not need any sort of ventilation.…”

Section: Introductionmentioning

confidence: 99%

Acoustic meta-silencer: Toward enabling ultrawide-band air-permeable noise barrier

Khodaei

Mehrvarz

Ghaffarivardavagh

et al. 2021

Journal of Vibration and Control

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In this article, we have first presented a metasurface design methodology by coupling the acoustic cavity to the coiled channel. The geometrical design parameters in this structure are subsequently studied both analytically and numerically to identify a road map for silencer design. Next, upon tuning the design parameters, we have introduced an air-permeable noise barrier capable of sound silencing in the ultrawide band of the frequency. It is has been shown that the presented metasurface can achieve +10 dB sound transmission loss from 170 Hz to 1330 Hz (≈3 octaves). Furthermore, we have numerically studied the ventilation and heat transfer performance of the designed metasurface. Enabling noise mitigation by leveraging the proposed metasurface opens up new possibilities ranging from residential and office noise reduction to enabling ultralow noise fan, propellers, and machinery.

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“…Active noise control uses traditional voice coil loudspeakers (VCLs) as the secondary source to suppress the noise in the target areas. Due to the omni-directivity of sound propagation, noise reduction is achieved at the target point, and the overflow of reverse sound waves increases the sound pressure level (SPL) of other adjacent areas [ 14 , 15 ]. When a multi-channel ANC system is used, the noise acquisition of the error microphone between the secondary sources produces crosstalk, which increases the additional calculation cost in the control process [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Noise Control Method Using Adaptive Adjustable Parametric Array Loudspeaker to Eliminate Environmental Noise in Real Time

Zheng

2021

IJERPH

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Long-term exposure to environmental noise is dangerous to human health. Therefore, there is an urgent need to suppress or eliminate environmental noise. Due to the limitation of environmental space, the use of reverse sound waves emitted by loudspeakers for noise elimination has been widely used in noise control. However, because of the omni-directionality of sound propagation, a traditional voice coil loudspeaker (VCL) is used as a secondary source (emission reverse sound wave). It is easy to increase the sound pressure in non-target areas and form significant acoustic feedback to the reference source. Therefore, we propose an online secondary path modeling method using an adjustable parametric array loudspeaker (PAL) based on ultrasounds to eliminate environmental noise in real time. According to the different distance of the target, the size of the PAL is adjusted adaptively to realize the noise control of different long-distance targets. The distribution of quiet areas is discussed. The experimental results showed that a PAL as a secondary source had the same noise reduction effect as a traditional VCL, but it had longer propagation distance, smaller sound feedback and a more regular and controllable distribution of quiet areas. These research findings have great potential for improving environmental noise and creating a quiet environment.

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Modelling and simulation of active noise control in a small room

Cited by 14 publications

References 5 publications

Proper location of the transducers for an active noise barrier

Proper location of the transducers for an active noise barrier

Acoustic meta-silencer: Toward enabling ultrawide-band air-permeable noise barrier

A Noise Control Method Using Adaptive Adjustable Parametric Array Loudspeaker to Eliminate Environmental Noise in Real Time

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