Eduard Sievers was a linguist with a focus on Germanic languages, and was one of the Leipzig “neogrammarians.” Using statistical methods and experimentation, he aimed to formulate laws for the melodic and rhythmic elements of language. He also became well known for “Sievers’ Law,” a phonetic law for Indo-European languages.

Wilhelm Doegen was born in Berlin. He studied economics, law, history, languages, and phonetics at the Friedrich-Wilhelms-Universität Berlin (today Humboldt-Universität zu Berlin), and in Oxford with the linguist and philologist Henry Sweet. After travels in France and England and a voluntary year in the military, he started teaching at secondary schools in Berlin in 1905. Focusing more and more on phonetics and prosody, Doegen published teaching materials for language learning and pronunciation.