A nanofibrous acoustic system based on the cavity/membrane resonance principle
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F16%3A00000763" target="_blank" >RIV/46747885:24620/16:00000763 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/46747885:24620/18:00000763
Výsledek na webu
<a href="http://journals.sagepub.com/doi/pdf/10.1177/0040517516685285" target="_blank" >http://journals.sagepub.com/doi/pdf/10.1177/0040517516685285</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1177/0040517516685285" target="_blank" >10.1177/0040517516685285</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
A nanofibrous acoustic system based on the cavity/membrane resonance principle
Popis výsledku v původním jazyce
Room acoustic solutions are based on measurements of the acoustic power of the room and acoustic elements with different functions (absorption tiles, absorption ceilings, absorption bodies, diffusers, barriers). This work is focused only on absorption elements, with an emphasis on addressing lower frequencies. The goal of this research is achieved by sound absorbing means which contains a cavity resonator with a nanofibrous resonant membrane, which overlaps orifices of the cavity resonator. The design of the material is based on broadband noise. Absorption of lower frequencies is restricted to a certain extent by the final thickness of the acoustic material. A two-microphone impedance tube for determining the sound absorption coefficient was used to measure the limited frequency spectrum 100–1600 Hz. These frequencies, however, cover the area particularly focusing on middle and lower frequencies. The principle of the acoustic system consists in using combination of a cavity resonator, by which the air or other material contained in its cavities is forced into vibration upon impact of sound waves of high frequency, and a nanofibrous resonant membrane, which is forced into vibration upon impact of sound waves of low frequency. The optimal arrangement of holes inside the perforated plate, according to broadband sound absorption, has been found.
Název v anglickém jazyce
A nanofibrous acoustic system based on the cavity/membrane resonance principle
Popis výsledku anglicky
Room acoustic solutions are based on measurements of the acoustic power of the room and acoustic elements with different functions (absorption tiles, absorption ceilings, absorption bodies, diffusers, barriers). This work is focused only on absorption elements, with an emphasis on addressing lower frequencies. The goal of this research is achieved by sound absorbing means which contains a cavity resonator with a nanofibrous resonant membrane, which overlaps orifices of the cavity resonator. The design of the material is based on broadband noise. Absorption of lower frequencies is restricted to a certain extent by the final thickness of the acoustic material. A two-microphone impedance tube for determining the sound absorption coefficient was used to measure the limited frequency spectrum 100–1600 Hz. These frequencies, however, cover the area particularly focusing on middle and lower frequencies. The principle of the acoustic system consists in using combination of a cavity resonator, by which the air or other material contained in its cavities is forced into vibration upon impact of sound waves of high frequency, and a nanofibrous resonant membrane, which is forced into vibration upon impact of sound waves of low frequency. The optimal arrangement of holes inside the perforated plate, according to broadband sound absorption, has been found.
Klasifikace
Druh
J<sub>SC</sub> - Článek v periodiku v databázi SCOPUS
CEP obor
—
OECD FORD obor
21001 - Nano-materials (production and properties)
Návaznosti výsledku
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)
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Textile Research Journal
ISSN
0040-5175
e-ISSN
—
Svazek periodika
88
Číslo periodika v rámci svazku
6
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
10
Strana od-do
644-653
Kód UT WoS článku
—
EID výsledku v databázi Scopus
2-s2.0-85042486878