Evaluation on the acoustic properties of multi-component polyester nonwovens

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F18%3A00005929" target="_blank" >RIV/46747885:24210/18:00005929 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24410/18:00005929

Výsledek na webu

<a href="http://strutex.ft.tul.cz/2018/Phd/BookOfExtendedAbstracts_STRUTEX_2018_International_PhD_student_day.pdf" target="_blank" >http://strutex.ft.tul.cz/2018/Phd/BookOfExtendedAbstracts_STRUTEX_2018_International_PhD_student_day.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation on the acoustic properties of multi-component polyester nonwovens

Popis výsledku v původním jazyce

This study presents an investigation on the acoustical properties of multi-component polyester nonwovens by using experimental and numerical methods. 15 types of nonwoven samples made by 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 applied to conduct the prediction of airflow resistivity. 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 has been performed to get the most acceptable model. The power-fitted empirical model exhibits very small error of 6.8%. It is shown that Delany-Bazley and Miki models can accurately predict surface impedance of multi-component polyester nonwovens, but Komatsu model has inaccuracy in prediction especially at low-frequency band. The results indicate that Miki model is the most acceptable method to predict the sound absorption coefficient with mean error 8.39% from all the samples.

Název v anglickém jazyce

Evaluation on the acoustic properties of multi-component polyester nonwovens

Popis výsledku anglicky

This study presents an investigation on the acoustical properties of multi-component polyester nonwovens by using experimental and numerical methods. 15 types of nonwoven samples made by 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 applied to conduct the prediction of airflow resistivity. 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 has been performed to get the most acceptable model. The power-fitted empirical model exhibits very small error of 6.8%. It is shown that Delany-Bazley and Miki models can accurately predict surface impedance of multi-component polyester nonwovens, but Komatsu model has inaccuracy in prediction especially at low-frequency band. The results indicate that Miki model is the most acceptable method to predict the sound absorption coefficient with mean error 8.39% from all the samples.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

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

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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