Robust active noise control in a car cabin: Evaluation of achievable performances with a feedback control scheme

Loiseau, Paul; Chevrel, Philippe; Yagoubi, Mohamed; Duffal, Jean‐Marc

doi:10.1016/j.conengprac.2018.09.015

Cited by 15 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, it is not easy to apply ANC to sound insulation over a wide area because of the sound field. Hence, ANC has been employed for applications in confined spaces, such as car interiors [ 20 , 21 ] and windows [ 17 ], using multiple microphones and loudspeakers. In the latter, such as wearable devices, two methods are widely used: PNC alone and a combination of PNC and ANC.…”

Section: Introductionmentioning

confidence: 99%

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Mizukoshi

Takahashi

2021

PLoS ONE

View full text Add to dashboard Cite

In recent years, noisy bustling environments have created situations in which earmuffs must soundproof only specific noise while transmitting significant sounds, such as voices, for work safety and efficiency. Two sound insulation technologies have been utilized: passive noise control (PNC) and active noise control (ANC). However, PNC is incapable of insulating selective frequencies of noise, and ANC is limited to low-frequency sounds. Thus, it has been difficult for traditional earmuffs to cancel out only high-frequency noise that people feel uncomfortable hearing. Here, we propose an acoustic notch filtering earmuff utilizing Helmholtz resonator (HR) arrays that provides a sound attenuation effect around the tuneable resonant frequency. A sheet-like sound insulating plate comprising HR arrays is realized in a honeycomb structure. Since the resonant frequency is determined by the geometry of the HR arrays, a highly audible sound region can be designed as the target frequency. In this research, the acoustic notch filtering performance of the proposed HR array plate is investigated in both simulations and experiments. Furthermore, the fabricated earmuffs using the novel HR array plates achieve a sound insulation performance exceeding 40 dB at the target frequency, which is sufficiently high compared to that of conventional earmuffs. The experimental results confirm that the proposed device is a useful approach for insulating frequency-selective sound.

show abstract

Section: Introductionmentioning

confidence: 99%

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Mizukoshi

Takahashi

2021

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Acoustic noise is one of the most serious environmental problems due to its variety of negative effects on people's health and lives; for example, acoustic noise is responsible for causing sleep disturbances, hearing impairment, and heart disease [1][2][3] . To protect the ears from acoustic noise and provide a comfortable acoustic environment, various sound insulation technologies have been developed; these technologies are classi ed mainly as either passive noise control (PNC) [4][5][6][7][8][9][10] or active noise control (ANC) [11][12][13][14][15][16][17][18] . PNC is based on physical sound insulation using a sound insulating material without a power supply, whereas ANC attenuates acoustic noise by generating waves of the opposite phase to the noise (i.e., anti-noise) from a loudspeaker.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, it is not easy to apply ANC to sound insulation over a wide area because of the sound eld. Hence, ANC has been employed for applications in con ned spaces, such as car interiors 13,14 and windows 15 , using multiple microphones and loudspeakers. In the latter form, as wearable devices, two methods are widely used today: PNC alone and both PNC and ANC.…”

Section: Introductionmentioning

confidence: 99%

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Mizukoshi

Takahashi

2021

Preprint

View full text Add to dashboard Cite

In recent years, noisy bustling environments have created situations in which earmuffs must soundproof only specific noise while transmitting significant sounds, such as voices, for work safety and efficiency. Two sound insulation technologies have been utilized: passive noise control (PNC) and active noise control (ANC). However, PNC is incapable of insulating selective frequencies of noise, and ANC is limited to low-frequency sounds. Thus, it has been difficult for traditional earmuffs to cancel out only high-frequency noise that people feel uncomfortable hearing. Here, we propose an acoustic notch filtering earmuff utilizing Helmholtz resonator (HR) arrays that provides a sound attenuation effect around the tuneable resonant frequency. A sheet-like sound insulating plate comprising HR arrays is realized in a honeycomb structure. Since the resonant frequency is determined by the geometry of the HR arrays, a highly audible sound region can be designed as the target frequency. In this research, the acoustic notch filtering performance of the proposed HR array plate was investigated in both simulations and experiments. Furthermore, the fabricated earmuffs using the novel HR array plates achieved a sound insulation performance exceeding 40 dB at the target frequency, which is sufficiently high compared to conventional earmuffs. The experimental results confirm that the proposed device is a useful approach for insulating frequency-selective sound.

show abstract

“…Low-frequency noise, considered in the frequency range up to approximately 500 Hz, is most difficult to limit due to passive barriers' inefficiency at this frequency range (when the noise frequency decreases, the mass, dimensions and cost of passive elements generally increases in order to be effective [2]). As an alternative or complementing solution, active control methods can be employed [3][4][5][6]. They can be used, e.g., to reduce noise entering through open windows [7,8].…”

Section: Introductionmentioning

confidence: 99%

Active Structural Acoustic Control of an Active Casing Placed in a Corner

et al. 2019

View full text Add to dashboard Cite

Electric appliances used in workplaces and everyday life often generate a low-frequency noise, which affects human body systems. Passive methods employed to reduce noise are not effective at low frequencies. The classical approach to active noise control practically involves the generation of local zones of quiet, whereas at other areas the noise is reinforced. Moreover, it usually requires a large number of secondary sound sources. Hence, an active casing approach has been developed. The active casing panels’ vibrations are controlled to reduce the device noise emission. Efficiency of this method has been previously confirmed by the authors and the results have been reported in multiple journal publications. However, in the previous research experiments, the active casing was placed at a distance from the enclosure walls. In this research, the active casing is located in a corner and such placement is intentionally used to facilitate the active control system’s operation. The noise reduction performance is investigated at multiple configurations, including a range of distances from the corner and different error microphone arrangements. The analysis of both primary and secondary paths is given. Advantages and drawbacks of different active casing configurations are presented and discussed.

show abstract

Robust active noise control in a car cabin: Evaluation of achievable performances with a feedback control scheme

Cited by 15 publications

References 36 publications

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Acoustic notch filtering earmuff utilizing Helmholtz resonator arrays

Active Structural Acoustic Control of an Active Casing Placed in a Corner

Contact Info

Product

Resources

About