Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F19%3A00005924" target="_blank" >RIV/46747885:24410/19:00005924 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.sagepub.com/doi/full/10.1177/0040517518811940" target="_blank" >https://journals.sagepub.com/doi/full/10.1177/0040517518811940</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1177/0040517518811940" target="_blank" >10.1177/0040517518811940</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Popis výsledku v původním jazyce

This study presents an investigation of the acoustical properties of multi-component polyester nonwovens with experimental and numerical methods. 15 types of nonwoven samples made with staple, hollow and bi-component polyester fibers were chosen to carry out this study. The AFD300 AcoustiFlow device was employed to measure airflow resistivity. Several models were grouped in theoretical and empirical model categories and used to predict the airflow resistivity. A simple empirical model based on fiber diameter and fabric bulk density was obtained through power-fitting method. The difference between measured and predicted airflow resistivity was analyzed. The surface impedance and sound absorption coefficient were determined by using 45mm Materiacustica impedance tube. Some widely used impedance models were used to predict acoustical properties. Comparison between measured and predicted values was carried out to determine the most accurate model for multi-component polyester nonwovens. The results show that one of the Tarnow model provides the closest prediction to the measured value with an error of 12%. The proposed power-fitted empirical model exhibits very small error of 6.8%. It is shown that the Delany-Bazley and Miki models can accurately predict surface impedance of multi-component polyester nonwovens, but Komatsu model is less especially at the low-frequency range. The results indicate that the Miki model is the most accurate method to predict the sound absorption coefficient with mean error of 8.39%.

Název v anglickém jazyce

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Popis výsledku anglicky

This study presents an investigation of the acoustical properties of multi-component polyester nonwovens with experimental and numerical methods. 15 types of nonwoven samples made with staple, hollow and bi-component polyester fibers were chosen to carry out this study. The AFD300 AcoustiFlow device was employed to measure airflow resistivity. Several models were grouped in theoretical and empirical model categories and used to predict the airflow resistivity. A simple empirical model based on fiber diameter and fabric bulk density was obtained through power-fitting method. The difference between measured and predicted airflow resistivity was analyzed. The surface impedance and sound absorption coefficient were determined by using 45mm Materiacustica impedance tube. Some widely used impedance models were used to predict acoustical properties. Comparison between measured and predicted values was carried out to determine the most accurate model for multi-component polyester nonwovens. The results show that one of the Tarnow model provides the closest prediction to the measured value with an error of 12%. The proposed power-fitted empirical model exhibits very small error of 6.8%. It is shown that the Delany-Bazley and Miki models can accurately predict surface impedance of multi-component polyester nonwovens, but Komatsu model is less especially at the low-frequency range. The results indicate that the Miki model is the most accurate method to predict the sound absorption coefficient with mean error of 8.39%.

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)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

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

89

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

3342-3361

Kód UT WoS článku

000477719300012

EID výsledku v databázi Scopus

2-s2.0-85061062838