Efficient Interior NSI Based on Various Beamforming Methods for Overview and Conformal Mapping using SONAH Holography for Details on Selected Panels

Hald, Jørgen; Mørkholt, Jakob; Gomes, Jesper

doi:10.4271/2007-01-2276

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…Various studies have demonstrated that the interior noise in an automobile has a significant influence on the driver's perception of operation, performance and quality [1,2]. In order to control interior noise, the noise source in a vehicle should be identified.…”

Section: Introductionmentioning

confidence: 99%

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Noise source identification of a passenger car based on sound intensity measurement

Chen

Wang

Liang

et al. 2010

IEEE 10th INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS

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In order to identify the interior noise source of the test vehicle, sound intensity measurement technology was used. The principle of the sound intensity measurement technology was introduced. The grids were arranged at the interior surfaces of the firewall, dashboard, roof, door, front windshield, and gear lever. The maximum noise source was confirmed to be the left front door. Also, the frequencies of the measured surfaces were calculated, and the first top three frequencies were confirmed in the descending order of the sound intensity. The technology support was provided for the interior noise control.

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Section: Introductionmentioning

confidence: 99%

“…In order to control interior noise, the noise source in a vehicle should be identified. Numerous methods for noise source identification including sound quality [3,4], acoustic holography [1,5], operational modal analysis, experimental modal analysis [6], inverse boundary element [7], wavelet transform [8], etc. have been widely used.…”

Section: Introductionmentioning

confidence: 99%

Noise source identification of a passenger car based on sound intensity measurement

Chen

Wang

Liang

et al. 2010

IEEE 10th INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS

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show abstract

“…We are considering here a processing technique called Spherical Harmonics Angularly Resolved Pressure (SHARP) based on the Spherical Harmonics Beamforming (SHB), [1,2]. The main benefit of the SHARP technique is that it is dedicated for source localization, and it provides a correct pressure contribution estimation for sources at the focus points, as is done also by traditional delay-and-sum beamforming.…”

Section: Introductionmentioning

confidence: 99%

3D localization of acoustic sources with a spherical array

Haddad

Hald

2008

The Journal of the Acoustical Society of America

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This paper describes a technique dedicated for the localization of acoustic sources in all directions and in the farfield. Classical beamforming techniques based on planar arrays provide an acoustic map restricted to a limited solid angle, but a spherical array does not have such a limitation since there is no preferential direction. In the processing called Spherical Harmonics Beamforming (SHB), the sound field on the sphere is decomposed with spherical harmonics functions, and then a corrected summation gives the acoustic contribution from a given direction. We have used a rigid spherical array, which has the advantage that cabling of microphones and integrated cameras can be hidden inside the sphere. A rigid surface also provides better numerical stability in connection with SHB. In this study, SHB is evaluated with respect to resolution and dynamic range. Simulated and experimental results are presented.

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“…The techniques can be applied to vibrating plates but they can also be applied to structures that are only approximately planar using conformal mapping. This technique has been applied successfully to the front side window of a car in a wind tunnel [25]. Planar inverse acoustics can even be applied to sources that are not nearly planar but the interpretation of the results becomes more difficult.…”

Section: Introductionmentioning

confidence: 99%

Acoustic source localization exploring theory and practice

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Efficient Interior NSI Based on Various Beamforming Methods for Overview and Conformal Mapping using SONAH Holography for Details on Selected Panels

Cited by 7 publications

References 6 publications

Noise source identification of a passenger car based on sound intensity measurement

Noise source identification of a passenger car based on sound intensity measurement

3D localization of acoustic sources with a spherical array

Acoustic source localization exploring theory and practice

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