A nanofibrous acoustic system based on the cavity/membrane resonance principle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F18%3A00000763" target="_blank" >RIV/46747885:24620/18:00000763 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24620/16:00000763

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>

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

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

2018

Kód důvěrnosti údajů

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

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

000429952000006

EID výsledku v databázi Scopus

2-s2.0-85042486878