Affiliations: [a] The University of Tokyo, Tokyo, Japan | [b] Iwate University, Iwate, Japan | [c] Takenaka Co. Ltd., Tokyo, Japan
Correspondence:
[*]
Corresponding author: Masae Nagase, The University of Tokyo, Tokyo, Japan. E-mail:nagase_m@bee.t.u-tokyo.ac.jp
Abstract: Biomagnetic measurements are affected by environmental
magnetic noises emitted by various electric systems including trains and
elevators. In this study, we measured low-frequency magnetic noise by using
a fluxgate magnetometer at a laboratory located in an urban area and
analyzed the dominant noise sources during real-world operation of these
systems. Additionally, we evaluated the noise reduction effect of a small,
magnetically shielded box combined with compensation coils.
Keywords: Environmental magnetic noises, biomagnetic measurement, extremely-low-frequency magnetic noise, magnetically shielded box
