Velocity condenser microphone for establishing the basic sound standard

maker:
Paul Gustavus Adolphus Helmuth Voigt

Velocity condenser microphone for establishing the basic sound standard, designed by P G A H Voigt (first used early 1927)

Details

Category:
Radio Communication
Object Number:
1933-142
type:
microphone
credit:
Voigt, P.G.A.H.