Determination of noise source height, part I: The measurement of equivalent acoustic source height above a reflecting surface

Glegg, Stewart; Yoon, Jong Rak

doi:10.1016/0022-460x(90)90565-h

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…Unfortunately sources close to the ground are expected when working with terrestrial transportation sources. Moreoverin [4,5,6] the 95% confidence interval on the computed equivalent height is greater than 0.2 m. An error of 0.2 monthe source height can result in prediction errors as high as 3dBa tl arge distances. Pallas used classical array signal processing with av ertical array on passenger cars [7,8] to drawam ap of physical sources with the same limitations on accuracy.…”

Section: Introductionmentioning

confidence: 96%

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Source Height Determination for Several Sources at the Same Height

Golay¹,

Dutilleux²,

Écotière³

2010

Acta Acustica united with Acustica

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Equivalent acoustic source height is an important parameter for accurate predictions of the acoustic impact of transportation infrastructures. Research has shown that this parameter can be obtained from at wo-microphone technique in the case of one broadband omnidirectional point source above an homogeneous ground, modeled as aDelany-Bazleyabsorber.Itisshown in this paper that this method can be generalized to n broadband sources with same height, above an homogeneous ground or aground with an impedance discontinuity.All sources are considered to have the same emission spectrum. The method is based on the comparison of the leveldi fference spectrum between twomicrophones -hereinafter called attenuation spectrum -measured and computed. Numerical and experimental validations confirm the reliability of the method for controlled noise sources. Furthermore, it is demonstrated that qualitative assessment of ground parameters is sufficient to obtain an accurate source height determination. PACS no. 43.28.Hr,43.50.Lj ©S.Hirzel Verlag · EAA 863 ACTA ACUSTICA UNITED WITH ACUSTICA Golay et al.:S ource height determination Vol. 96 (2010)

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Section: Introductionmentioning

confidence: 96%

“…Glegg and Yo on [4,5] proposed at echnique based on av ertical array with 7m icrophones. The frequencydependent equivalent source height of ad istribution of sources is derivedfrom cross-spectrum densities between microphones.…”

Section: Introductionmentioning

confidence: 99%

Source Height Determination for Several Sources at the Same Height

Golay¹,

Dutilleux²,

Écotière³

2010

Acta Acustica united with Acustica

View full text Add to dashboard Cite

show abstract

“…Among these methods, one finds methods based on Laser Doppler Vibrometry [13], Source Height Measurement [14], Sound Intensity [15], Nearfield Acoustic Holography [16] and Spatial Transformation of Sound Fields [17]. Although sound intensity measurements give results that are precise enough for many applications, noise reflections and other sources may influence the results due to the directional characteristics of the intensity probe, thus only well-spaced sources may be separated.…”

Section: Introductionmentioning

confidence: 99%