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Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib.

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Presentation on theme: "Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib."— Presentation transcript:

1 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 MRI compatible headphones with outside reference microphone Figure Legend:

2 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Applied FXLMS active noise control system diagram Figure Legend:

3 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Duct example illustrating feedforward control Figure Legend:

4 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Measured transient in situ acoustic noise response of the EPI scan Figure Legend:

5 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Multiple-reference FXLMS active noise control system diagram Figure Legend:

6 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Measured SPL for EPI scan in situ (solid line, Outside Mic; dotted line, Inside Mic) Figure Legend:

7 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Results of (a) EPI scan X gradient power and (b) in situ test results (solid line, Control off; dotted line, Control on) Figure Legend:

8 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Results of (a) EPI scan Y gradient power and (b) in situ test results (solid line, Control off; dotted line, Control on) Figure Legend:

9 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Results of (a) EPI scan Z gradient power and (b) in situ test results (solid line, Control off; dotted line, Control on) Figure Legend:

10 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 Results of (a) EPI scan microphone power and (b) in situ test results (solid line, Control off; dotted line, Control on) Figure Legend:

11 Date of download: 6/9/2016 Copyright © ASME. All rights reserved. From: In Situ Active Noise Cancellation Applied to Magnetic Resonance Imaging J. Vib. Acoust. 2012;134(1):011017-011017-7. doi:10.1115/1.4005008 EPI in situ test results for combined response of the microphone and X, Y, Z gradients as references (solid line, Control off; dotted line, Control on) Figure Legend:


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