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Eckel Industries is an acoustics noise control company founded 1952 in Cambridge, Massachusetts. The company engineers and constructs anechoic (echo-free) sound chambers. ==Noteworthy Projects== *Largest anechoic chamber ever constructed at General Electric in Pittsfield, Massachusetts〔An Anechoic Chamber for Noise Tests on Large Power Transformers Benoit, A. W.; Hemmes, R. T.; Schulz, M. W. Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers Volume 74, Issue 3, Jan. 1955 Page(s):50 - 56 〕 *World's quietest room, located at Orfield Labs in Minneapolis, Minnesota. The Orfield Labs chamber was certified by the Guinness Book of World Records in 2005 as the quietest room on Earth.〔Anechoic chamber〕〔http://www.tcbmag.com/industriestrends/technology/104458p1.aspx〕 *The Eckel anechoic chamber located at Microsoft in Redmond, Washington was certified by the Guinness Book of World Records as the quietest place on earth in 2015, measuring -20.6dB. 〔http://fossbytes.com/why-microsoft-just-created-the-quietest-place-on-earth-and-made-world-record/〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eckel Industries」の詳細全文を読む スポンサード リンク
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