Design and analysis of a compact acoustic filter for broad band noise absorption

Chhibber, Utkarsh; Kumar, Ranjeet; Haldar, Sushmita; Hota, R. N.

doi:10.1016/j.apacoust.2018.05.011

Cited by 9 publications

(2 citation statements)

References 11 publications

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“…[9] Examples of this phenomenon include the fluctuation of gas inside closed-side pipelines, the grazing flow over airplane landing gear, and the fluctuation of cabin pressure inside of vehicles. [10]For suppressing pure tones of constant frequency, a Helmholtz resonator is a different sort of side branch resonator that consists of a short neck connected to a big cavity with a fixed volume of compressible fluid. [11] Increases in gearbox loss inside an air intake system will lower the total sound pressure level since the resonator has a strong impact on gearbox loss.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Low-Frequency Noise for Muffler by Optimizing the Space between Three 1-Degrees of Freedom Helmholtz Resonator

Jatola,

Gupta

2024

MATEC Web Conf.

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The Helmholtz resonator is one of the basic elements to attenuate low-frequency noise and increase sound transmission loss in a muffler for particular low frequency zone. It can be enhancing the performance without any change in the geometry of the muffler. It can greatly reduce the high-intensity noise in low-frequency zones. A comparative study has been carried out by implementing the two and three resonators arranged in series arrangement at optimum spacing for increasing transmission loss. The model of Helmholtz resonator at wavelength 1000 mm at different spacing like (closely spaced: -(4), 1stantinode: -(4) and 1st node: -(2) ) were prepared by using wave build 3-D and simulating above condition on wave 1-D module. This work is also validated by simulating the same geometry on Comsol tool for the mentioned spacing. This attempt gives a comparative study about perfect spacing during use of more than one resonator in a series. The neck and cavity ratio are taken as 2 and 1.85 respectively for the modelling of an identical resonator. The Conclusion shows that, at (4) resonator gives the maximum attenuation at 340 Hz cut-off frequency in low-frequency zone.

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Section: Introductionmentioning

confidence: 99%

Enhancement of Low-Frequency Noise for Muffler by Optimizing the Space between Three 1-Degrees of Freedom Helmholtz Resonator

Jatola,

Gupta

2024

MATEC Web Conf.

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“…Although all materials absorb some incident sound, the term "acoustical material" has historically been used to refer to materials that have been created with the express intention of offering high absorption values. In the scientific study, Chhibber et al (2018) explained that an automobile engine's performance depends not only on its main components but also on the efficiency of its auxiliary systems, such as the fuel, engine cooling, exhaust, and intake systems. An essential component of every automobile vehicle, the exhaust system helps improve the vehicle's ride quality and fuel efficiency (Liu et al, 2016;Reddy, 2017).…”

Section: Introductionmentioning

confidence: 99%

Analysis of Noise Level with Convergent and Divergent Shape of Muffler and its Impact on Noise Pollution

Jatola,

Gupta

2023

IJERR

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Noise pollution is one of the key hazards that decreases people's quality of life globally. Due to the rapid development of technology, industrialization, urbanization, and transportation networks, noise pollution has reached serious levels in recent years. Sound transmission loss, the attenuation of sound as it passes through diverse objects and environments, is crucial in lowering noise pollution and preserving the acoustic integrity of ecosystems. Due to de-throttling tactics implemented to optimize cylinder fill, the intake system of internal combustion engines is the primary noise source while the vehicle is at low speeds and high loads. Therefore, achieving high acoustic performance of intake systems constitutes a critical issue in complying with the increasingly stringent European regulations for overall noise emission. The Transmission Loss computation is typically the most used technique for describing a system's acoustic performances. This work provided an overview of sound transmission loss and discussed its substantial environmental effects. It investigates the fundamentals of sound transmission, the factors that influence it, and the environmental impacts of sound attenuation. This paper proposed a comparison of three designs like straight duct (muffler), convergent and divergent design of muffler. The main aim is to observe sound transmission loss and compare the noise level with three muffler configurations with the same gas volume. High transmission loss indicates more noise reduction in muffler design, which will help reduce environmental noise pollution.

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Effect of mean flow on shape correction factor and acoustic properties of a compact acoustic filter

Chhibber

Hota

2020

Applied Acoustics

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Design and analysis of a compact acoustic filter for broad band noise absorption

Cited by 9 publications

References 11 publications

Enhancement of Low-Frequency Noise for Muffler by Optimizing the Space between Three 1-Degrees of Freedom Helmholtz Resonator

Enhancement of Low-Frequency Noise for Muffler by Optimizing the Space between Three 1-Degrees of Freedom Helmholtz Resonator

Analysis of Noise Level with Convergent and Divergent Shape of Muffler and its Impact on Noise Pollution

Effect of mean flow on shape correction factor and acoustic properties of a compact acoustic filter

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