| Presentation | 2003/5/9 [Invited paper] Active Noise Control Applied for Exhaust Ducts Noise : The Specifications for Microphone and Loudspeaker Kiyohiro KURISU, Shin'ichi ABE, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The specifications for the active noise control (ANC) system that is put to practical use for the exhaust ducts noise are reviewed. The length of the duct's cross section specifies the upper bound of attenuatable noise frequency, and the required specifications for the microphone and the loudspeaker are decided by the environment in the duct. The influence of high temperature gas in the duct for the microphone are mitigated by picking up the noise via L stainless steel pipe. The temperature around the loudspeaker will cool by adopting a brunch duct system with an inhalation-of-air opening. The controller performs active noise controlling by filtered-x LMS algorithm, and is monitoring signal powers simultaneously: the powers of reference, error, and loudspeaker signals, so as to judge the current state of ANC, and, if necessary, to make re-identification of secondary path (error path). This monitoring function helps ANC system to be stable even if the environment in a duct changed. From an argument of signal delay time (group delay) of the loudspeaker and the controller, the required full length of the ANC system is calculated. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Active noise control (ANC) / Exhaust duct noise, / practical use of ANC / Microphone / Loudspeaker / durability(weatherproof) |
| Paper # | EA2003-36 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2003/5/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited paper] Active Noise Control Applied for Exhaust Ducts Noise : The Specifications for Microphone and Loudspeaker |
| Sub Title (in English) | |
| Keyword(1) | Active noise control (ANC) |
| Keyword(2) | Exhaust duct noise, |
| Keyword(3) | practical use of ANC |
| Keyword(4) | Microphone |
| Keyword(5) | Loudspeaker |
| Keyword(6) | durability(weatherproof) |
| 1st Author's Name | Kiyohiro KURISU |
| 1st Author's Affiliation | TOA Corporation() |
| 2nd Author's Name | Shin'ichi ABE |
| 2nd Author's Affiliation | TOA Corporation |
| Date | 2003/5/9 |
| Paper # | EA2003-36 |
| Volume (vol) | vol.103 |
| Number (no) | 53 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |