赫尔曼-路德维希-费迪南-冯-亥姆霍兹(1821-1894)的 "双重警报器",他是德国物理学家和生理学家,广泛地研究了听觉机制。(The “double siren” by Hermann Ludwig Ferdinand von Helmholtz (1821-1894), a German physicist and physiologist, who studied extensively the mechanisms of hearing.)未知艺术家 |
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日期不详 · 图片ID: 949979
Private Collection / Bridgeman Images |
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