Karl Rudolph Koenig (also known as Rudolf Koenig or König) studied at the University of Königsberg. In about 1852, he moved to Paris and joined the workshop of famous violin-maker Jean Baptiste Vuillaume. In his leisure time, Koenig attended public lectures and studied mechanics, becoming increasingly interested in acoustics research. After six years of apprenticeship with Vuillaume, Koenig became a master violin-maker, but his own new business was a workshop for acoustic apparatus.
Colladon was an important physicist working in Switzerland and France. His experiments on the compression of air and liquids, the speed of sound in acoustic signals, and atmospheric electricity brought him academic success and made him a sought-after consulting engineer for gas factories and tunnel construction.
Chladni was a physicist whose work focused on experimental acoustics. He invented the “Chladni figure” and various instruments. Until his death, he continued to travel and present his inventions and findings to a wide audience.
Franz Max Osswald, born in Winterthur, graduated as a mechanical engineer in 1905 at the Swiss Federal Institute of Technology (E.T.H.). In 1924, he installed a laboratory for applied acoustics at E.T.H. After completing his habilitation in 1928, he served as the first acoustician at a polytechnic, teaching as a "Privatdozent." Osswald described his discipline as an indispensable complement to architecture, technology, and hygiene.
Fondazione Scienza e Tecnica,. (17 August 2015AD) 2015. “Sounds, Vibrations, And Marloye's Harp”. Florence, Italy: Fondazione Scienza e Tecnica. https://www.youtube.com/watch?v=Dro3_nwwUcI&list=PLslExxbg3O-fAeclmcjO0LId_xADwxalv&index=5.