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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Echo Mountain ： ウィキペディア英語版 Echo Mountain Echo Mountain is a mountain summit of the San Gabriel Mountains, in the Angeles National Forest above Altadena, in Los Angeles County, California. ==Geography== Echo Mountain was shaped from an alluvial fan between Rubio and Las Flores canyons. It is geographically defined by Castle Canyon to its leeward side, Rubio Canyon at its foot, and Las Flores Canyon on its windward side. Echo has a mean elevation of . It is most visible as a short mountain extension whose ridge protrudes below the peak of Inspiration Point. Echo Mountain's name is derived from the number of repetitions one's voice could emit into Castle Canyon. Boy Scout projects were made to find the "sweet spot" where the largest number of repetitions could be heard. During the days of the Mount Lowe Railway "echophones" were set up to assist in voice projections near the best sweet spots. 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「Echo Mountain」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.