Non-negative intensity and back-calculated non-negative intensity for analysis of directional structure-borne sound

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU124074" target="_blank" >RIV/00216305:26620/17:PU124074 - isvavai.cz</a>
Result on the web
<a href="http://asa.scitation.org/doi/full/10.1121/1.4990374" target="_blank" >http://asa.scitation.org/doi/full/10.1121/1.4990374</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1121/1.4990374" target="_blank" >10.1121/1.4990374</a>

Result language
angličtina
Original language name
Non-negative intensity and back-calculated non-negative intensity for analysis of directional structure-borne sound
Original language description
Non-negative intensity (NNI) is an approach to identify the surface areas of a structure that contribute to sound power. NNI is evaluated in terms of the acoustic impedance matrix obtained directly at the structural surface and as such can only identify surface contributions to sound power at a far-field receiver surface that fully circumscribes the structure. In contrast, back-calculated NNI is evaluated in terms of the acoustic impedance matrix obtained at a far-field receiver surface, and hence can identify surface contributions to sound power at a far-field receiver surface that does not fully circumscribe the structure. In this work, NNI and acoustic intensity obtained numerically using the boundary element method and experimentally from near-field acoustic holography measurements are compared for different modes. Back-calculated NNI evaluated for full and partial receiver surfaces is also compared with acoustic intensity for the different modes. Results for back-calculated NNI show that different regions on the plate surface contribute sound to different receiver locations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10307 - Acoustics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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