1909 graduated Basel University.
Since 1917 has taught and done research at various higher education institutions and research centers. 1923 launched pop. science journal “Iskra” (The Spark). 1933-1953 corresponding member, USSR Academy of Science.
Since 1940 Head, Acoustics Laboratory, Lebedev Physics Institute, USSR Academy of Science. 1959 attended International Acoustics Congress, Stuttgart. Received doctorate from Dresden Polytcchnicum.
Works deal with: propagation of sound waves. Aircraft engine and propeller noise. Architectural acoustics.
Acoustics of waves of finite amplitude. Propagation of acoustic vibration in absorption media.
God can not be proven by science which is the main way we study and understand our universe or natural world.