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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA

ISSN

0001-4966

e-ISSN

1520-8524

Svazek periodika

142

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

117-123

Kód UT WoS článku

000405656700028

EID výsledku v databázi Scopus

2-s2.0-85024120660