Title :
An active noise control system for MR noise: A study on an available ANC system in magnetic field
Author :
Hirayama, Ryotaro ; Kida, Masahiro ; Kajikawa, Yoshinobu ; Tani, Tohru ; Kurumi, Yoshimasa
Author_Institution :
Fac. of Eng. Sci., Kansai Univ., Suita
Abstract :
MRI (magnetic resonance imaging) is medical equipment system which in late years has been used to obtain the cross-sectional image of the human body. The MRI used in Shiga University of Medical Science generates a very large noise (about 120dBSPL). In order to reduce this noise, we attempt to implement an active noise control (ANC) system. However, MRI generates too intense magnetic field for dynamics acoustic equipment to be used. In this paper, therefore, the cancellation performance of the ANC system using optical microphone and piezo-electric loudspeaker is demonstrated through experimental results in order to realize the available ANC system in magnetic field.
Keywords :
active noise control; biomedical MRI; biomedical equipment; loudspeakers; medical control systems; microphones; piezoelectric devices; ANC system; MR noise; Shiga University of Medical Science; acoustic equipment; active noise control system; cross-sectional image; human body; intense magnetic field; magnetic resonance imaging; medical equipment system; noise cancellation performance; optical microphone; piezo-electric loudspeaker; Acoustic noise; Active noise reduction; Biomedical equipment; Control systems; Magnetic fields; Magnetic noise; Magnetic resonance imaging; Medical control systems; Noise cancellation; Optical noise;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697704
