Head-mounted active noise control system and its application to reducing MRI noise
We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MRI noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers and consists of a head...
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| Published in: | The Journal of the Acoustical Society of America Vol. 131; no. 4_Supplement; p. 3380 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-04-2012
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| Online Access: | Get full text |
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| Summary: | We propose an active noise control (ANC) system for reducing periodic noise generated in a high magnetic field such as noise generated from magnetic resonance imaging (MRI) devices (MRI noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers and consists of a head-mounted structure to control noise near the user's ears. Moreover, internal model control (IMC)-based feedback ANC is employed because the MRI noise includes some periodic components and is predictable. Our experimental results demonstrate that the proposed ANC system (head-mounted structure) can significantly reduce MRI noise by approximately 30 dB in a high field in an actual MRI room even if the imaging mode changes frequently. |
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| ISSN: | 0001-4966 1520-8524 |
| DOI: | 10.1121/1.4708744 |