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A platform for research: civil engineering, architecture and urbanism
Experimental research is said to have demonstrated that receiver composed of contact between metallic point and galena reproduces human voice faithfully and with remarkable clarity.
Experimental research is said to have demonstrated that receiver composed of contact between metallic point and galena reproduces human voice faithfully and with remarkable clarity.
Galena-metal telephone receiver
Sur le recepteur telephonique autode tecteur pointe-crystal ou pointe-metal
Dongier, R. (author)
1920
3 pages
Article (Journal)
French
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