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Engineering methods to predict noise levels at reference points with known source properties
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.ORCID-id: 0000-0002-9632-8398
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.ORCID-id: 0000-0001-7898-8643
2015 (Engelska)Ingår i: Applied Acoustics, ISSN 0003-682X, E-ISSN 1872-910X, Vol. 96, s. 68-74Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Two engineering methods are proposed to predict the sound pressure levels at a given point when the sound power level of a noise source is known and the transfer function between the source and the reference point can be obtained. The first method is applicable when the source is surrounded by many reflectors, or inside a box-like structure. A single monopole with average transfer function is suggested for this situation. For a source with a strong directivity placed in an essentially free space, the "box-source" method is recommended to take into account of the source directivity. The total sound power is in this case divided into five independent noise sources which are obtained via ordinary sound power measurement methods. Experimental verifications are made for several cases in laboratory. Satisfactory results are obtained for both methods.

Ort, förlag, år, upplaga, sidor
2015. Vol. 96, s. 68-74
Nyckelord [en]
Railway noise, Equivalent monopole, Source directivity, Engineering method, Average transfer function, Directional source model
Nationell ämneskategori
Annan teknik
Identifikatorer
URN: urn:nbn:se:kth:diva-169235DOI: 10.1016/j.apacoust.2015.03.014ISI: 000355033900008Scopus ID: 2-s2.0-84926058967OAI: oai:DiVA.org:kth-169235DiVA, id: diva2:821288
Forskningsfinansiär
EU, FP7, Sjunde ramprogrammet, FP7-284877
Anmärkning

QC 20150615

Tillgänglig från: 2015-06-15 Skapad: 2015-06-12 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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Feng, LepingÅbom, Mats

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