The first systematic study of acoustics is considered to be the introduction of tonal systems and tunings in music in the 3rd millennium BC in China. From antiquity, the scientific exploration of acoustics is documented, among others, by Pythagoras of Samos (c. 570-510 BC), who mathematically analyzed the relationship between string length and pitch using the monochord. In the second half of the 19th century, the first acoustic measuring and recording devices were developed, such as the phonautograph by Édouard-Léon Scott de Martinville and later the phonograph by Thomas Alva Edison (1847-1931). August Kundt developed the Kundt's tube and used it to measure sound absorption. Heinrich Barkhausen invented the first device for measuring loudness. This volume by Karl Schaefer is illustrated with 35 black-and-white images. It is a reprint of the original edition.