The sound waves in telephonic communication are converted into electric signals by the________ and the signals reach the _____________ at the other end by cables.
A
mouthpiece,mouthpiece
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B
mouthpiece,earpiece
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C
earpiece,mouthpiece
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D
earpiece,earpiece
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Solution
The correct option is B mouthpiece,earpiece The mouthpiece has a mic that converts the audio waves from our voice to electric signals , that are carried further away to receiver .
The earpiece has a speaker ,A speaker converts the electric signal received to the audio wave .