| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2010-10-05 |
| タイトル |
|
|
タイトル |
Magnetic Noise Due to Sound of Footsteps on Wooden Free-Access Floor Outside a Magnetically Shielded Room for Biomagnetic and Nondestructive Measurements |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Active microtremor isolation (ACMI) system |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
footstep |
| キーワード |
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|
主題Scheme |
Other |
|
主題 |
free-access floor |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
magnetically shielded room (MSR) |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Yamazaki, Keita
Abe, Takayuki
Terazono, Yasushi
Fujimaki, Norio
Murata, Tsutomu
Oyama, Daisuke
Kobayasi, Koichiro
|
| 著者(機関) |
|
|
値 |
Takenaka Research and Development Institute, Takenaka Corporation |
| 著者(機関) |
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|
値 |
Takenaka Research and Development Institute, Takenaka Corporation |
| 著者(機関) |
|
|
値 |
National Institute of Information and Communications Technology |
| 著者(機関) |
|
|
値 |
National Institute of Information and Communications Technology |
| 著者(機関) |
|
|
値 |
National Institute of Information and Communications Technology |
| 著者(機関) |
|
|
値 |
Faculty of Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Faculty of Engineering, Iwate University |
| 登録日 |
|
|
日付 |
2010-10-05 |
| 書誌情報 |
IEEE TRANSACTIONS ON MAGNETICS
巻 45,
号 10,
p. 4644-4647,
発行日 2009-10-01
|
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0018-9464 |
| Abstract |
|
|
内容記述タイプ |
Other |
|
内容記述 |
In order to realize the ultimate low magnetic field in magnetically shielded rooms (MSRs) for nondestructive measurements and biomagnetic measurements such as magnetoencephalography and magnetocardiography, we investigated magnetic noises due to microtremors caused by sound pressure and mechanical vibration which arose from footsteps applied on the wooden free-access floor. Using superconducting quantum interference device (SQUID) magnetometers in this MSR, we measured the magnetic noises with and without operating an active microtremor isolation (ACMI) system that reduced microtremors transmitted from the concrete slab underneath the MSR. The microtremors of the MSR due to footsteps were divided into two components. One was caused by mechanical vibrations transmitted through the concrete slab at frequencies from 10 to 25 Hz. Its frequency characteristic depended on the mechanical resonance of the MSR. The other was caused by sound pressure transmitted directly from the free-access floor. This component occurred at frequencies from 25 to 50 Hz even with the operation of ACMI when footsteps were applied on the wooden free-access floor. |
| 出版者 |
|
|
出版者 |
IEEE |
| 権利 |
|
|
権利情報 |
(c) 2009 IEEE |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1109/TMAG.2009.2025185 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
itm-v45n10p4644-4647.pdf (560.8 kB)
