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close this bookRadio and Electronics (DED Philippinen, 66 p.)
close this folder3. TRANSDUCERS
View the document(introduction...)
View the document3.1. MICROPHONES
View the document3.2. LOUDSPEAKERS
View the document3.3. THE TELEPHON SYSTEM
View the document3.4. PROBLEM OF FREQUENCY RANGES
View the document3.5. BANDWIDTH

3.3. THE TELEPHON SYSTEM

With the devices explained during the last chapter, you are able now to understand how a normal telephon circuit connected by wires is functioning. Just imagine in the circuit shown above is used a mocrophon of the CARBON TYPE and an earphone working on the electrodynamic principle.


fig. 16