On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects
This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These couple...
Ausführliche Beschreibung
Autor*in: |
Shen, Chao [verfasserIn] Liu, Yu [verfasserIn] Huang, Lixi [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2021 |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Journal of sound and vibration - London : Academic Press, 1964, 508 |
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Übergeordnetes Werk: |
volume:508 |
DOI / URN: |
10.1016/j.jsv.2021.116202 |
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Katalog-ID: |
ELV006241859 |
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245 | 1 | 0 | |a On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects |
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520 | |a This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. | ||
650 | 4 | |a Mutual impedance | |
650 | 4 | |a Quarter-wavelength resonators | |
650 | 4 | |a Analog electrical method | |
650 | 4 | |a Green’s theorem | |
700 | 1 | |a Liu, Yu |e verfasserin |4 aut | |
700 | 1 | |a Huang, Lixi |e verfasserin |4 aut | |
773 | 0 | 8 | |i Enthalten in |t Journal of sound and vibration |d London : Academic Press, 1964 |g 508 |h Online-Ressource |w (DE-627)268125759 |w (DE-600)1471444-9 |w (DE-576)255266553 |x 0022-460X |7 nnns |
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936 | b | k | |a 33.12 |j Akustik |
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936 | b | k | |a 53.79 |j Elektroakustik |j Tonstudiotechnik |
936 | b | k | |a 50.32 |j Dynamik |j Schwingungslehre |x Technische Mechanik |
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allfields |
10.1016/j.jsv.2021.116202 doi (DE-627)ELV006241859 (ELSEVIER)S0022-460X(21)00274-1 DE-627 ger DE-627 rda eng 530 DE-600 33.12 bkl 50.36 bkl 53.79 bkl 50.32 bkl 58.56 bkl Shen, Chao verfasserin aut On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. Mutual impedance Quarter-wavelength resonators Analog electrical method Green’s theorem Liu, Yu verfasserin aut Huang, Lixi verfasserin aut Enthalten in Journal of sound and vibration London : Academic Press, 1964 508 Online-Ressource (DE-627)268125759 (DE-600)1471444-9 (DE-576)255266553 0022-460X nnns volume:508 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.12 Akustik 50.36 Technische Akustik 53.79 Elektroakustik Tonstudiotechnik 50.32 Dynamik Schwingungslehre Technische Mechanik 58.56 Lärmschutz Erschütterungsdämpfung AR 508 |
spelling |
10.1016/j.jsv.2021.116202 doi (DE-627)ELV006241859 (ELSEVIER)S0022-460X(21)00274-1 DE-627 ger DE-627 rda eng 530 DE-600 33.12 bkl 50.36 bkl 53.79 bkl 50.32 bkl 58.56 bkl Shen, Chao verfasserin aut On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. Mutual impedance Quarter-wavelength resonators Analog electrical method Green’s theorem Liu, Yu verfasserin aut Huang, Lixi verfasserin aut Enthalten in Journal of sound and vibration London : Academic Press, 1964 508 Online-Ressource (DE-627)268125759 (DE-600)1471444-9 (DE-576)255266553 0022-460X nnns volume:508 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.12 Akustik 50.36 Technische Akustik 53.79 Elektroakustik Tonstudiotechnik 50.32 Dynamik Schwingungslehre Technische Mechanik 58.56 Lärmschutz Erschütterungsdämpfung AR 508 |
allfields_unstemmed |
10.1016/j.jsv.2021.116202 doi (DE-627)ELV006241859 (ELSEVIER)S0022-460X(21)00274-1 DE-627 ger DE-627 rda eng 530 DE-600 33.12 bkl 50.36 bkl 53.79 bkl 50.32 bkl 58.56 bkl Shen, Chao verfasserin aut On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. Mutual impedance Quarter-wavelength resonators Analog electrical method Green’s theorem Liu, Yu verfasserin aut Huang, Lixi verfasserin aut Enthalten in Journal of sound and vibration London : Academic Press, 1964 508 Online-Ressource (DE-627)268125759 (DE-600)1471444-9 (DE-576)255266553 0022-460X nnns volume:508 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.12 Akustik 50.36 Technische Akustik 53.79 Elektroakustik Tonstudiotechnik 50.32 Dynamik Schwingungslehre Technische Mechanik 58.56 Lärmschutz Erschütterungsdämpfung AR 508 |
allfieldsGer |
10.1016/j.jsv.2021.116202 doi (DE-627)ELV006241859 (ELSEVIER)S0022-460X(21)00274-1 DE-627 ger DE-627 rda eng 530 DE-600 33.12 bkl 50.36 bkl 53.79 bkl 50.32 bkl 58.56 bkl Shen, Chao verfasserin aut On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. Mutual impedance Quarter-wavelength resonators Analog electrical method Green’s theorem Liu, Yu verfasserin aut Huang, Lixi verfasserin aut Enthalten in Journal of sound and vibration London : Academic Press, 1964 508 Online-Ressource (DE-627)268125759 (DE-600)1471444-9 (DE-576)255266553 0022-460X nnns volume:508 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.12 Akustik 50.36 Technische Akustik 53.79 Elektroakustik Tonstudiotechnik 50.32 Dynamik Schwingungslehre Technische Mechanik 58.56 Lärmschutz Erschütterungsdämpfung AR 508 |
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10.1016/j.jsv.2021.116202 doi (DE-627)ELV006241859 (ELSEVIER)S0022-460X(21)00274-1 DE-627 ger DE-627 rda eng 530 DE-600 33.12 bkl 50.36 bkl 53.79 bkl 50.32 bkl 58.56 bkl Shen, Chao verfasserin aut On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. Mutual impedance Quarter-wavelength resonators Analog electrical method Green’s theorem Liu, Yu verfasserin aut Huang, Lixi verfasserin aut Enthalten in Journal of sound and vibration London : Academic Press, 1964 508 Online-Ressource (DE-627)268125759 (DE-600)1471444-9 (DE-576)255266553 0022-460X nnns volume:508 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 33.12 Akustik 50.36 Technische Akustik 53.79 Elektroakustik Tonstudiotechnik 50.32 Dynamik Schwingungslehre Technische Mechanik 58.56 Lärmschutz Erschütterungsdämpfung AR 508 |
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Journal of sound and vibration |
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On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects |
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title_full |
On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects |
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Shen, Chao |
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Journal of sound and vibration |
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Journal of sound and vibration |
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Shen, Chao Liu, Yu Huang, Lixi |
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Shen, Chao |
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10.1016/j.jsv.2021.116202 |
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530 |
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title_sort |
on acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: mutual impedance effects |
title_auth |
On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects |
abstract |
This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. |
abstractGer |
This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. |
abstract_unstemmed |
This paper discusses the neighbouring interaction among multiple quarter-wavelength resonators that influences sound absorption. A circular two-cavity resonator covered by a very thin layer of porous material is introduced, which consists of a centre circular hole and an annular cavity. These coupled quarter-wavelength resonators can induce a shift of resonance frequency due to high-order evanescent modes. An analytical expression of mutual impedance is derived which explains the resonance frequency shift theoretically. After validating the theoretical method with numerical and experimental results, cavity height corrections are calculated to implicitly quantify the effects of mutual impedance which contribute significantly to the overall impedance of the resonators. The influences of mutual-impedance related parameters in terms of cavity properties and surface resistance on the sound absorption performance of the quarter-wave resonators are discussed. It is concluded that, apart from strong local resonances of individual resonators, mutual impedance plays a significant role in the absorption mechanisms of multiple coupled quarter-wavelength resonators. |
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title_short |
On acoustic absorption mechanisms of multiple coupled quarter-wavelength resonators: Mutual impedance effects |
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up_date |
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