Panel Contribution Analysis in a Vehicle Cabin using a Dual Layer Handheld Array with Integrated Position Measurement

Hald, Jørgen; Mørkholt, Jakob

doi:10.4271/2009-01-2171

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…The work of Hald [31,38,39] on the SONAH method showed that it is relevant to define the projection functions Ψ according to the waves defined in Equation ( 8):…”

Section: Methods For 3d Reconstructionmentioning

confidence: 99%

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Besset,

Lenoir,

Sinou

2023

Applied Sciences

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Radiated noise is a major topic of interest regarding the brake squeal phenomenon as it is directly linked to the noise generated which can be potentially detrimental to user comfort and perception. However, very few studies offer in-depth and comprehensive insight into the analysis and understanding of acoustic noise during squeal events. This study is intended to provide an original contribution to this issue by investigating acoustic phenomena occurring during the squeal phenomenon via a digital antenna composed of 117 microphones. Experiments are performed on the Friction-Induced Vibration and noisE test bench at Ecole Centrale de Lyon (FIVE@ECL). The first main aim is to investigate the characteristics of the acoustic radiated field during brake squeal and more particularly to describe the evolution of the radiated field patterns per revolution of the disc system. The second major aim is to illustrate the possibility of reconstructing the radiated acoustic field everywhere in the space surrounding the brake system, leading to the construction of a robust representation of 3D acoustic patterns, providing acoustic squeal events in the physical space around the brake system. Results show that the vibratory signature remains identical during squeal event braking test. The acoustic signature of squeal noise consists mainly of a fundamental frequency and its harmonic components, with secondary lower contributions from other fundamental frequencies. The associated radiated acoustic field during squeal events are characterized by different directivities and intensities of the acoustic radiated field for each squeal frequency, with potential changes in these directivities and intensities over short times corresponding to the rotation period of the disc.

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“…The work of Hald [31,38,39] on the SONAH method showed that it is relevant to define the projection functions Ψ according to the waves defined in Equation ( 8):…”

Section: Methods For 3d Reconstructionmentioning

confidence: 99%

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Besset,

Lenoir,

Sinou

2023

Applied Sciences

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“…In this way, the blocked forces can be mapped onto the receiver surface points with the help of the path FRF's to determine the path contributions as will be explained below. Similar approaches such as 'Panel Contribution Analysis' or 'Source Path Contribution Analysis' can be found in literature 4,5 but this method differs in because the structure borne TPA, or rather iTPA is used to analyze the transfer of airborne noise through a partition.…”

Section: Transfer Path Analysismentioning

confidence: 99%

Diagnostic Testing of Sound Insulation Using an in-Situ Transfer Path Analysis

PATIL,

ELLIOTT,

MOORHOUSE

2023

Acoustics 2015

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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%

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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Panel Contribution Analysis in a Vehicle Cabin using a Dual Layer Handheld Array with Integrated Position Measurement

Cited by 7 publications

References 3 publications

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Diagnostic Testing of Sound Insulation Using an in-Situ Transfer Path Analysis

Loudness calculation procedure to study electronic steering column lock noise measurement

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