Investigation on the dissemination of unit watt in airborne sound and applications
Sound 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...
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| פורמט: | Online |
| שפה: | אנגלית |
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Logos Verlag Berlin
2021
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| נושאים: | |
| גישה מקוונת: | ONIX_20210408_9783832549718_68 |
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| _version_ | 1869515976269103104 |
|---|---|
| author | Brezas, Spyros |
| author_browse | Brezas, Spyros |
| author_facet | Brezas, Spyros |
| author_sort | Brezas, Spyros |
| collection | Directory of Open Access Books |
| description | Sound 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. |
| format | Online |
| id | doab-20.500.12854ir-64426 |
| institution | Directory of Open Access Books |
| language | eng |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Logos Verlag Berlin |
| publisherStr | Logos Verlag Berlin |
| record_format | ojs |
| spelling | doab-20.500.12854ir-644262024-04-04T14:40:27Z Investigation on the dissemination of unit watt in airborne sound and applications Brezas, Spyros sound power substitution correction uncertainty traceability thema EDItEUR::P Mathematics and Science Sound 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. 2021-04-08T15:34:41Z 2021-04-08T15:34:41Z 2019 book ONIX_20210408_9783832549718_68 9783832549718 https://directory.doabooks.org/handle/20.500.12854/64426 eng Aachener Beiträge zur Akustik image/jpeg Attribution-NonCommercial-NoDerivatives 4.0 International https://www.logos-verlag.de/cgi-bin/engbuchmid?isbn=4971&lng=eng&id= https://www.logos-verlag.de/ebooks/OA/978-3-8325-4971-8.pdf Logos Verlag Berlin Logos Verlag Berlin 10.30819/4971 10.30819/4971 04b263a1-7fba-4491-9eae-1c394ac42fc3 9783832549718 Logos Verlag Berlin 32 209 Berlin/Germany open access |
| spellingShingle | sound power substitution correction uncertainty traceability thema EDItEUR::P Mathematics and Science Brezas, Spyros Investigation on the dissemination of unit watt in airborne sound and applications |
| title | Investigation on the dissemination of unit watt in airborne sound and applications |
| title_full | Investigation on the dissemination of unit watt in airborne sound and applications |
| title_fullStr | Investigation on the dissemination of unit watt in airborne sound and applications |
| title_full_unstemmed | Investigation on the dissemination of unit watt in airborne sound and applications |
| title_short | Investigation on the dissemination of unit watt in airborne sound and applications |
| title_sort | investigation on the dissemination of unit watt in airborne sound and applications |
| topic | sound power substitution correction uncertainty traceability thema EDItEUR::P Mathematics and Science |
| topic_facet | sound power substitution correction uncertainty traceability thema EDItEUR::P Mathematics and Science |
| url | ONIX_20210408_9783832549718_68 |
| work_keys_str_mv | AT brezasspyros investigationonthedisseminationofunitwattinairbornesoundandapplications |