This oscillator that generates signals below the audible range (sub audio or infrasound) was found in a 1965 documentation. Transistors are for general use.
When the power is on, the 1 µF capacitor charges slowly by R1 and P1 until then on trigger...
The components used in this configuration are not common today. The circuit is from the 1982 SGS...
The integrated circuit used in this project is uncommon today, but the configuration can be...