Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts
Noise reduction inside waveguide systems has gained momentum owing to a great interest in it. To attenuate the sound in a broad frequency range, this study aims to compare the effects of two acoustic liners, a perforated plate backed by an air cavity (PP-Air cavity), or by a porous material (PP-PM),...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research Polish Academy of Sciences
2020-02-01
|
| Series: | Archives of Acoustics |
| Subjects: | |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2567 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839604147254460416 |
|---|---|
| author | Raja DHIEF Amine MAKNI Mohamed TAKTAK Mabrouk CHAABANE Mohamed HADDAR |
| author_facet | Raja DHIEF Amine MAKNI Mohamed TAKTAK Mabrouk CHAABANE Mohamed HADDAR |
| author_sort | Raja DHIEF |
| collection | DOAJ |
| description | Noise reduction inside waveguide systems has gained momentum owing to a great interest in it. To attenuate the sound in a broad frequency range, this study aims to compare the effects of two acoustic liners, a perforated plate backed by an air cavity (PP-Air cavity), or by a porous material (PP-PM), on the acoustic behaviour of lined ducts using a numerical model to compute the multimodal scattering matrix. From this matrix, the reflection and the transmission coefficients are computed and therefore the acoustic power attenuation is deduced. Moreover, the effects of geometry of ducts with and without changes in the section are investigated. The numerical results are obtained for five configurations, including cases of narrowing and widening of a duct portion with sudden or progressive discontinuities. Accordingly, numerical coefficients of reflection and transmission as well as the acoustic power attenuation show the relative influence of acoustic liners in each type of configuration. |
| format | Article |
| id | doaj-art-2daedf2defe14ee99138dc7f94e7554c |
| institution | Matheson Library |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2020-02-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-2daedf2defe14ee99138dc7f94e7554c2025-08-02T04:20:52ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2020-02-0145110.24425/aoa.2020.132481Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined DuctsRaja DHIEF0Amine MAKNI1Mohamed TAKTAK2Mabrouk CHAABANE3Mohamed HADDAR4Faculty of Sciences of SfaxUniversity of SfaxFaculty of Sciences of Sfax, University of SfaxFaculty of Sciences of SfaxUniversity of SfaxNoise reduction inside waveguide systems has gained momentum owing to a great interest in it. To attenuate the sound in a broad frequency range, this study aims to compare the effects of two acoustic liners, a perforated plate backed by an air cavity (PP-Air cavity), or by a porous material (PP-PM), on the acoustic behaviour of lined ducts using a numerical model to compute the multimodal scattering matrix. From this matrix, the reflection and the transmission coefficients are computed and therefore the acoustic power attenuation is deduced. Moreover, the effects of geometry of ducts with and without changes in the section are investigated. The numerical results are obtained for five configurations, including cases of narrowing and widening of a duct portion with sudden or progressive discontinuities. Accordingly, numerical coefficients of reflection and transmission as well as the acoustic power attenuation show the relative influence of acoustic liners in each type of configuration.https://acoustics.ippt.pan.pl/index.php/aa/article/view/2567absorbent systems effectdiscontinuities effectscattering matrixacoustic power attenuation |
| spellingShingle | Raja DHIEF Amine MAKNI Mohamed TAKTAK Mabrouk CHAABANE Mohamed HADDAR Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts Archives of Acoustics absorbent systems effect discontinuities effect scattering matrix acoustic power attenuation |
| title | Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts |
| title_full | Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts |
| title_fullStr | Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts |
| title_full_unstemmed | Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts |
| title_short | Investigation on the Effects of Acoustic Liner Variation and Geometry Discontinuities on the Acoustic Performance of Lined Ducts |
| title_sort | investigation on the effects of acoustic liner variation and geometry discontinuities on the acoustic performance of lined ducts |
| topic | absorbent systems effect discontinuities effect scattering matrix acoustic power attenuation |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2567 |
| work_keys_str_mv | AT rajadhief investigationontheeffectsofacousticlinervariationandgeometrydiscontinuitiesontheacousticperformanceoflinedducts AT aminemakni investigationontheeffectsofacousticlinervariationandgeometrydiscontinuitiesontheacousticperformanceoflinedducts AT mohamedtaktak investigationontheeffectsofacousticlinervariationandgeometrydiscontinuitiesontheacousticperformanceoflinedducts AT mabroukchaabane investigationontheeffectsofacousticlinervariationandgeometrydiscontinuitiesontheacousticperformanceoflinedducts AT mohamedhaddar investigationontheeffectsofacousticlinervariationandgeometrydiscontinuitiesontheacousticperformanceoflinedducts |