Active reduction of high-level acoustic noise on a fMRI test-bed using labview and FPGA platforms

Author

Ramachandran, Venkat R. ; Panahi, Issa M S ; Perez, Eduardo

Author_Institution

Texas Univ., Richardson, TX

fYear

2008

fDate

March 31 2008-April 4 2008

Firstpage

1517

Lastpage

1520

Abstract

We present an Active Noise Control (ANC) system that is designed to cancel acoustic noise at high sound levels. The ANC system is graphically designed using Lab VIEW and implemented on FPGA. NLMS algorithm is used for updating the filter co-efficients. The ANC system is evaluated on a realistic test-bed mimicking an actual fMRI bore. The algorithm is tested for various tonal frequencies in the range from 100 to 5000 Hz and the performance is measured in terms of the noise cancellation. We observe that good noise cancellation (15 to 45 dB SPL) can be obtained with NLMS algorithm over the entire bandwidth.

Keywords

acoustic noise; biomedical MRI; image denoising; least mean squares methods; medical image processing; FMRI; FPGA; LabVIEW; NLMS algorithm; active noise control; active noise reduction; high-level acoustic noise; noise cancellation; Acoustic noise; Acoustic testing; Active noise reduction; Boring; Control systems; Field programmable gate arrays; Filters; Noise cancellation; Noise level; System testing; FPGA; LabVIEW; NLMS; Real time ANC;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on

Conference_Location

Las Vegas, NV

ISSN

1520-6149

Print_ISBN

978-1-4244-1483-3

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2008.4517910

Filename

4517910