Beat frequency oscillator

Made:
circa 1955 in Copenhagen county
maker:
Brüel & Kjær (Sound and Vibration Measurement) A/S

Beat frequency oscillator, Bruel & Kjaer, Copenhagen, Denmark, model 1014, in fitted carrying case, serial no.22663, circa 1955, with 2 leads (loose)

Details

Category:
Acoustics
Object Number:
1993-322
type:
beat frequency oscillator
credit:
Royal Nat. Throat, Nose & Ear Hospital