Flow resistivity estimation from practical absorption coefficients of fibrous absorbers

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

There are useful conversion methods from Sabine absorption coefficients according to ISO 354 to other acoustic properties for room boundaries, e.g., surface impedance or flow resistivity. However, most available sound absorption coefficients are practical absorption coefficients, which are simplified according to ISO 11654 from the Sabine absorption coefficients and widely used by absorber manufacturers as their absorbers’ performance indicators. In this study, practical absorption coefficients are used to inversely characterize the flow resistivity via reliable models. 15 absorber samples with varying mounting conditions are used for validating the flow resistivity estimation, having a wide flow resistivity range of 10–110 kNsm4 . As expected, the practical absorption coefficients are found to be less reliable input parameters for estimating the flow resistivity, but with more datasets, the degradation becomes insignificant compared to the Sabine absorption coefficients. The estimated flow resistivity will be a valuable parameter to predict the absorption characteristics of different thickness and mounting conditions
Original languageEnglish
Article number107014
JournalApplied Acoustics
Volume158
Number of pages6
ISSN0003-682X
DOIs
Publication statusPublished - 2020

Keywords

  • Flow resistivity
  • Fibrous materials
  • Sabine absorption coefficients
  • Practical absorption coefficient
  • Inverse characterization

Cite this

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title = "Flow resistivity estimation from practical absorption coefficients of fibrous absorbers",
abstract = "There are useful conversion methods from Sabine absorption coefficients according to ISO 354 to other acoustic properties for room boundaries, e.g., surface impedance or flow resistivity. However, most available sound absorption coefficients are practical absorption coefficients, which are simplified according to ISO 11654 from the Sabine absorption coefficients and widely used by absorber manufacturers as their absorbers’ performance indicators. In this study, practical absorption coefficients are used to inversely characterize the flow resistivity via reliable models. 15 absorber samples with varying mounting conditions are used for validating the flow resistivity estimation, having a wide flow resistivity range of 10–110 kNsm4 . As expected, the practical absorption coefficients are found to be less reliable input parameters for estimating the flow resistivity, but with more datasets, the degradation becomes insignificant compared to the Sabine absorption coefficients. The estimated flow resistivity will be a valuable parameter to predict the absorption characteristics of different thickness and mounting conditions",
keywords = "Flow resistivity, Fibrous materials, Sabine absorption coefficients, Practical absorption coefficient, Inverse characterization",
author = "Cheol-Ho Jeong",
year = "2020",
doi = "10.1016/j.apacoust.2019.107014",
language = "English",
volume = "158",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Pergamon Press",

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Flow resistivity estimation from practical absorption coefficients of fibrous absorbers. / Jeong, Cheol-Ho.

In: Applied Acoustics, Vol. 158, 107014, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Flow resistivity estimation from practical absorption coefficients of fibrous absorbers

AU - Jeong, Cheol-Ho

PY - 2020

Y1 - 2020

N2 - There are useful conversion methods from Sabine absorption coefficients according to ISO 354 to other acoustic properties for room boundaries, e.g., surface impedance or flow resistivity. However, most available sound absorption coefficients are practical absorption coefficients, which are simplified according to ISO 11654 from the Sabine absorption coefficients and widely used by absorber manufacturers as their absorbers’ performance indicators. In this study, practical absorption coefficients are used to inversely characterize the flow resistivity via reliable models. 15 absorber samples with varying mounting conditions are used for validating the flow resistivity estimation, having a wide flow resistivity range of 10–110 kNsm4 . As expected, the practical absorption coefficients are found to be less reliable input parameters for estimating the flow resistivity, but with more datasets, the degradation becomes insignificant compared to the Sabine absorption coefficients. The estimated flow resistivity will be a valuable parameter to predict the absorption characteristics of different thickness and mounting conditions

AB - There are useful conversion methods from Sabine absorption coefficients according to ISO 354 to other acoustic properties for room boundaries, e.g., surface impedance or flow resistivity. However, most available sound absorption coefficients are practical absorption coefficients, which are simplified according to ISO 11654 from the Sabine absorption coefficients and widely used by absorber manufacturers as their absorbers’ performance indicators. In this study, practical absorption coefficients are used to inversely characterize the flow resistivity via reliable models. 15 absorber samples with varying mounting conditions are used for validating the flow resistivity estimation, having a wide flow resistivity range of 10–110 kNsm4 . As expected, the practical absorption coefficients are found to be less reliable input parameters for estimating the flow resistivity, but with more datasets, the degradation becomes insignificant compared to the Sabine absorption coefficients. The estimated flow resistivity will be a valuable parameter to predict the absorption characteristics of different thickness and mounting conditions

KW - Flow resistivity

KW - Fibrous materials

KW - Sabine absorption coefficients

KW - Practical absorption coefficient

KW - Inverse characterization

U2 - 10.1016/j.apacoust.2019.107014

DO - 10.1016/j.apacoust.2019.107014

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VL - 158

JO - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

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