Contribution Analysis in Pass-By Testing Using Moving Source Beamforming

Ginn, K. B.; Newton, Gary

doi:10.4271/2011-01-1669

Cited by 3 publications

(3 citation statements)

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“…In recent years, all kinds of vehicle manufacturers, for example, military, aircraft and mainly automobile industries, have noise reduction and control as one of the mail goals due to the increasing requirements for low noise emission. In an effort to decrease and control the interior noise and levels of vibration of not only the above-mentioned vehicles but also other equipment, devices and machines, many techniques have been developed: 1 noise source identification (NSI) techniques [2][3][4][5][6][7][8][9][10] and active and passive control methods. [11][12][13][14][15] In particular, passive controls can benefit of the use of innovative materials, such as piezoelectrics, shape memory alloys, 11 magnetostrictive materials 12 and chiral unit cells, [13][14][15][16][17][18] and their mechanical properties can be designed within very large range of modulus and Poisson's ratio values.…”

Section: Introductionmentioning

confidence: 99%

“…A particular technique is the moving source beamforming, a useful technique for noise sources which are in motion, for instance, a car pass-by, an aircraft fly-over and others. 9 Spherical beamforming is essentially an extension of a planar beamforming. This type of configuration has the advantage of being able to cover all directions with direction-independent angular resolution.…”

Section: Introductionmentioning

confidence: 99%

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Loudness calculation procedure to study electronic steering column lock noise measurement

Maffiodo

Sesana

2019

Advances in Mechanical Engineering

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In the automotive field, the customer requirements for low interior noise and pleasant sound quality inside a vehicle are getting higher and higher. Various national and international regulatory authorities established and reviewed vehicle interior noise for the past years. Besides, lots of studies have shown that vehicle noise can influence the driver's perceptions and also his or her driving capabilities. To succeed in this scenario, all manufacturers are investing in technology and research in order to improve their component performance. Working on the noise source so as to reduce the seriousness of these noise problems can be really effective. However, various engineering techniques are available to deal with noise and sound-measuring instruments, and systems can help to identify the nature of the problem and they can also be helpful in determining the right procedure to analyse the noise problem. This work proposes a procedure to evaluate the noise originated from an electronic steering column lock device which is used to lock and unlock the steering wheel according to European safety requirements. In particular, different standards and requirements for loudness evaluation have been discussed and the formulation of a straightforward procedure, which can be used to evaluate the loudness according to costumer's requirements, is defined.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Loudness calculation procedure to study electronic steering column lock noise measurement

Maffiodo

Sesana

2019

Advances in Mechanical Engineering

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“…It also shields the directly radiated engine noise from the engine compartment, since there is no visible sound radiation from this region in either figure. Moving source beamforming also appears to be a suitable tool for the visualisation of the noise emissions of moving vehicles [24]. However, detailed work about the application of this method for the analysis of pass-by noise source characteristics has not been published.…”

Section: Engine Noisementioning

confidence: 99%

Noise source characteristics in the ISO 362 vehicle pass-by noise test: Literature review

et al. 2013

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A B S T R A C TSince many people are exposed to road traffic noise in urban areas, current legislation aims to limit vehicle noise emissions. In Europe, the vehicle pass-by noise test is implemented according to the international standard ISO 362. As a result of more recent investigations of urban traffic, a revision to the ISO 362 standard has been proposed that includes a constantspeed test in addition to the traditional accelerated test in order to determine the pass-by noise value. To ensure compliance with the pass-by noise test vehicle manufacturers and suppliers must quantify vehicle noise source characteristics during the design stage of the vehicle. In addition, predictive tools need to be available during the product development phase in order to estimate the final pass-by noise level. In this paper an extensive literature survey is presented of noise source characteristics in the ISO 362 vehicle pass-by noise test. Vehicle pass-by noise is analysed in the time and frequency domains and a ranking of the noise source contributions is established. The characteristics of the four major noise sources (engine, intake system, exhaust system, tyre/road system) contributing to pass-by noise as well as current prediction methods are reviewed.

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Features for Evaluating Source Localization Effectiveness in Sound Maps from Acoustic Cameras

Fredianelli,

Pedrini,

Bolognese

et al. 2024

Sensors

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Acoustic cameras (ACs) have become very popular in the last decade as an increasing number of applications in environmental acoustics are observed, which are mainly used to display the points of greatest noise emission of one or more sound sources. The results obtained are not yet certifiable because the beamforming algorithms or hardware behave differently under different measurement conditions, but at present, not enough studies have been dedicated to clarify the issues. The present study aims to provide a methodology to extract analytical features from sound maps obtained with ACs, which are generally only visual information. Based on the inputs obtained through a specific measurement campaign carried out with an AC and a known sound source in free field conditions, the present work elaborated a methodology for gathering the coordinates of the maximum emission point on screen, its distance from the real position of the source and the uncertainty associated with this position. The results obtained with the proposed method can be compared, thus acting as a basis for future comparison studies among calculations made with different beamforming algorithms or data gathered with different ACs in all real case scenarios. The method can be applicable to any other sector interested in gathering data from intensity maps not related to sound.

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Contribution Analysis in Pass-By Testing Using Moving Source Beamforming

Cited by 3 publications

References 0 publications

Loudness calculation procedure to study electronic steering column lock noise measurement

Loudness calculation procedure to study electronic steering column lock noise measurement

Noise source characteristics in the ISO 362 vehicle pass-by noise test: Literature review

Features for Evaluating Source Localization Effectiveness in Sound Maps from Acoustic Cameras

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