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**Harvard**

Zhang, X. (2003) *To determine the horizontal directivity of a train pass-by*.

** BibTeX **

@conference{

Zhang2003,

author={Zhang, Xuetao},

title={To determine the horizontal directivity of a train pass-by},

booktitle={Proceedings of InterNoise 2003, Jeju, Korea, August 25-28, 2003 },

abstract={Based on the assumption that railway noise can be modeled as a group/line of incoherent point sources a calculation scheme has been proposed for determining the horizontal directivity of train pass-by noise: with a certain directivity function(s) assigned to the individual point sources, the model will determine the effective horizontal directivity of the train pass-by noise.
The sample calculations show that: (1) if all point sources are assigned monopole directivity the effective horizontal directivity of the train pass-by noise shall have the monopole pattern, for any measurement distance; (2) if all point sources are assigned the same directivity other than a monopole, the effective horizontal directivity of the train pass-by noise shall have the same directivity pattern when a measurement distance is not less than 3 times the train length, otherwise the effective directivity pattern of the train pass-by noise will vary with the distance; (3) the horizontal-directivity function used in some existing national models can be derived when some reasonable assumptions are applied.
},

year={2003},

keywords={railway noise, horizontal directivity},

}

** RefWorks **

RT Conference Proceedings

SR Print

ID 64938

A1 Zhang, Xuetao

T1 To determine the horizontal directivity of a train pass-by

YR 2003

T2 Proceedings of InterNoise 2003, Jeju, Korea, August 25-28, 2003

AB Based on the assumption that railway noise can be modeled as a group/line of incoherent point sources a calculation scheme has been proposed for determining the horizontal directivity of train pass-by noise: with a certain directivity function(s) assigned to the individual point sources, the model will determine the effective horizontal directivity of the train pass-by noise.
The sample calculations show that: (1) if all point sources are assigned monopole directivity the effective horizontal directivity of the train pass-by noise shall have the monopole pattern, for any measurement distance; (2) if all point sources are assigned the same directivity other than a monopole, the effective horizontal directivity of the train pass-by noise shall have the same directivity pattern when a measurement distance is not less than 3 times the train length, otherwise the effective directivity pattern of the train pass-by noise will vary with the distance; (3) the horizontal-directivity function used in some existing national models can be derived when some reasonable assumptions are applied.

LA eng

OL 30