Abstract
In the 19th century Hermann von Helmholtz laid down the scientific basis for acoustical research in the most general terms.His assistant in Heidelberg, Wilhelm Wundt, founded the first psychological laboratory in the world in Leipzig and devoted himself to an intensive study of the measurement of loudness, drawing his inspirations to a great extent from the psychophysical ideas of his senior colleague, Gustav Theodor Fechner.Wundt’s personal library has been located in the University Library of Sendai for 75 years.A few details of this transaction are described.Heinrich Barkhausen also had many followers in Japan to whom he lent his support through his lectures on his journeys to Japan.In recent years Eberhard Zwicker and Seiichiro Namba have made an important contribution to German-Japanese cooperation.
