| 000 | 02762naaaa2200325uu 4500 | ||
|---|---|---|---|
| 001 | https://directory.doabooks.org/handle/20.500.12854/64426 | ||
| 005 | 20220220060232.0 | ||
| 020 | _a4971 | ||
| 020 | _a9783832549718 | ||
| 024 | 7 |
_a10.30819/4971 _cdoi |
|
| 041 | 0 | _aEnglish | |
| 042 | _adc | ||
| 072 | 7 |
_aP _2bicssc |
|
| 100 | 1 |
_aBrezas, Spyros _4auth |
|
| 245 | 1 | 0 | _aInvestigation on the dissemination of unit watt in airborne sound and applications |
| 260 |
_aBerlin/Germany _bLogos Verlag Berlin _c2019 |
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| 300 | _a1 electronic resource (209 p.) | ||
| 506 | 0 |
_aOpen Access _2star _fUnrestricted online access |
|
| 520 | _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. | ||
| 540 |
_aCreative Commons _fhttps://creativecommons.org/licenses/by-nc-nd/4.0/ _2cc _4https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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| 546 | _aEnglish | ||
| 650 | 7 |
_aMathematics & science _2bicssc |
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| 653 | _asound power | ||
| 653 | _asubstitution | ||
| 653 | _acorrection | ||
| 653 | _auncertainty | ||
| 653 | _atraceability | ||
| 856 | 4 | 0 |
_awww.oapen.org _uhttps://www.logos-verlag.de/ebooks/OA/978-3-8325-4971-8.pdf _70 _zDOAB: download the publication |
| 856 | 4 | 0 |
_awww.oapen.org _uhttps://directory.doabooks.org/handle/20.500.12854/64426 _70 _zDOAB: description of the publication |
| 999 |
_c69464 _d69464 |
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