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Heinz Bohlen : ウィキペディア英語版 | Heinz Bohlen Heinz Bohlen (born 1935 at Krefeld in the Lower Rhine region of Germany)〔"(Heinz Bohlen )", ''Bohlen-Pierce-Conference.org''.〕 is a microwave electronics and communications engineer.〔Hyoung-Gook Kim, Nicolas Moreau, Thomas Sikora (2006). ''MPEG-7 Audio and Beyond: Audio Content Indexing and Retrieval'' (Google eBook), p.180. ISBN 9780470093351.〕 He designed and described numerous non-octave musical scales (alternative musical tunings and temperaments), many based on combination tones, including the Bohlen–Pierce scale in 1972 (independently discovered by John R. Pierce in 1984, also a microwave electronics and communications engineer, six years later and Kees van Prooijen in 1978),〔"(the inventors of the bohlen-pierce scale )", ''ZiaSpace.com''.〕 the A12 scale, and the 833 cents scale. Bohlen began to question and investigate tunings in the early 1970s when a friend and graduate student at the Hochschule für Musik und Theater asked him to begin recording concerts at the school. Bohlen asked students why all their music used twelve-tone equal temperament, including the octave, and, dissatisfied with the answers, began to investigate alternate tunings.〔 ==Sources==
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