000			03157cam a2200397 i 4500
001			on1266738606
003			OCoLC
005			20240726105305.0
008			210223t20192019gw ad fob 000 0 eng d
040			_aLUN _beng _erda _epn _cLUN _dOCLCO _dVT2 _dS2H _dOCLCF _dUKKNU _dLIP _dUAB _dOCLCO _dOCLCQ _dNT
020			_a3832549714
020			_a9783832549718 _q((electronic)l(electronic)ctronic)
050	0	4	_aTA365 _b.I584 2019
049			_aMAIN
100	1		_aBrezas, Spyros, _e1
245	1	0	_aInvestigation on the dissemination of unit watt in airborne sound and applications /Spyros Brezas.
260			_aBerlin, Germany : _bLogos Verlag Berlin GmbH, _c(c)2019.
300			_a1 online resource (iv, 197 pages) : _billustrations, charts
336			_atext _btxt _2rdacontent
337			_acomputer _bc _2rdamedia
338			_aonline resource _bcr _2rdacarrier
347			_adata file _2rda
490	1		_aAachener Beitrage zur Akustik
530			_a2 _ub
500			_aAuthor's doctoral thesis, Rheinisch-Westfälische Technische Hochschule Aachen.
504			_a1
520	0		_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.
650		0	_aSound _xMeasurement.
655		1	_aElectronic Books.
700	1		_aRheinisch-Westfälische Technische Hochschule Aachen, _edegree awarding institution.
856	4	0	_uhttps://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=3541175&site=eds-live&custid=s3260518 _zClick to access digital title | log in using your CIU ID number and my.ciu.edu password
936			_aBATCHLOAD
942			_cOB _D _eEB _hTA _m2019 _QOL _R _x _8NFIC _2LOC
994			_a92 _bNT
999			_c95373 _d95373
902			_a1 _bCynthia Snell _c1 _dCynthia Snell