LEADER 03255oam 2200481 450 001 9910418317203321 005 20230621135710.0 010 $a9783832549718 024 8 $ahttps://doi.org/10.30819/4971 035 $a(CKB)4100000011479711 035 $a(oapen)https://directory.doabooks.org/handle/20.500.12854/64426 035 $a(ScCtBLL)b9ce4a60-9be4-4a3c-af98-416064d36872 035 $a(EXLCZ)994100000011479711 100 $a20210223h20192019 fy 0 101 0 $aeng 135 $aur||#|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aInvestigation on the dissemination of unit watt in airborne sound and applications /$fSpyros Brezas 210 $aBerlin/Germany$cLogos Verlag Berlin$d2019 210 1$aBerlin, Germany :$cLogos Verlag Berlin GmbH,$d[2019] 210 4$dİ2019 215 $a1 online resource (iv, 197 pages) $cillustrations, charts; digital file(s) 225 0 $aAachener Beitrage zur Akustik 300 $aAuthor's doctoral thesis, Rheinisch-Westfa?lische Technische Hochschule Aachen. 311 08$aPrint version: 3832549714 320 $aIncludes bibliographical references. 330 $aSound power describes the emission of sound from sound sources. Despite today's state-of-the art measurement techniques, the current sound power determination methods are restricted due to various limitations. To overcome these limitations, a new sound power determination method is proposed, aiming at the establishment of traceability in airborne sound. This will enable the characterization of a sound source by its free field sound power. The dissertation describes a study on the dissemination process, which will allow the sound power of a device under test located at a real surrounding environment, to be referred to its free field sound power. Apart from the sound power, the corresponding uncertainty may be estimated in a transparent way, where each uncertainty component is provided. The basic tool for the dissemination process is the substitution method using aerodynamic reference sound sources, applied to both sound pressure and sound intensity measurements. Initially, a theoretical investigation deals with the factors that influence the substitution method. Experimental results are then presented based on measurements using a specially designed scanning apparatus. The transition from calibration to in situ conditions and the required correction, due to changes in environmental and operational conditions, is then discussed. In the last section, the sound power level of devices under test is determined along with its related uncertainty, which is further compared to the up-to-date uncertainty values. 606 $aEngineering$xAcoustics 610 $asound power 610 $asubstitution 610 $acorrection 610 $auncertainty 610 $atraceability 615 0$aEngineering$xAcoustics. 676 $a620.2 700 $aBrezas$b Spyros$0929733 712 02$aRheinisch-Westfa?lische Technische Hochschule Aachen, 801 0$bUkMaJRU 912 $a9910418317203321 996 $aInvestigation on the dissemination of unit watt in airborne sound and applications$92089901 997 $aUNINA