| Presentation | 2014-01-28 Modified-error Feedback ANC System with Linear Prediction Filter Nobuhiro MIYAZAKI, Yoshinobu KAJIKAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have studied an ANC (Active Noise Control) system for reducing MR noise, which is generated from MRI device and realizing clear verbal communication between medical staff. Ordinary ANC systems generally have the secondary path. Therefore, the Filtered-x algorithm diverges if the phase error of the secondary path model does not satisfy the stability condition - π /2 to π /2. In this paper, we focus on the modified-error feedback ANC system. We have proposed a head-mounted ANC system for realizing clear verbal communication between medical staff. This system consists of microphones and loudspeakers located near the user's ear. This system can realize clear verbal communication because the user's ears are not covered with anything. In the head-mounted ANC system, the microphones are located near the user's ear and the user's voice is consequently picked up at the microphones. Therefore, user's voice is also radiated from the loudspeakers as echo signal. A solution to this problem is to utilize a linear prediction filter. The linear prediction filter can seprate wideband noise from narrowband noise by setting an appropriate delay. In this paper, we examine the appropriate delay to separate speech signal and MR noise and the suppression ability of echo signal through computer simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Active Noise Control / MR noise / Modified-error feedback ANC system / Linear Prediction Filter / Head-mounted ANC system |
| Paper # | EA2013-110 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2014/1/20(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Modified-error Feedback ANC System with Linear Prediction Filter |
| Sub Title (in English) | |
| Keyword(1) | Active Noise Control |
| Keyword(2) | MR noise |
| Keyword(3) | Modified-error feedback ANC system |
| Keyword(4) | Linear Prediction Filter |
| Keyword(5) | Head-mounted ANC system |
| 1st Author's Name | Nobuhiro MIYAZAKI |
| 1st Author's Affiliation | Faculty of Engineering Science, Kansai University() |
| 2nd Author's Name | Yoshinobu KAJIKAWA |
| 2nd Author's Affiliation | Faculty of Engineering Science, Kansai University |
| Date | 2014-01-28 |
| Paper # | EA2013-110 |
| Volume (vol) | vol.113 |
| Number (no) | 413 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |