ocr: OPTICAL FIBERS MICROPHONE LASER - - : - TMAVIAY MODULAIOR SOUND SIGNAL One waya sound signal can GLASS CABLE be transmitted between two places is by light bouncing LIGHT alongspecial glass tubes called DETECTOR optical fibers. The signal from at microphone modulates an AMPLIFIER otherwise constant laser beam. ELECTRIC This light signal passes along SOUND SIGNAL an optical fiber. A detector changes the light into an electric current. This current 1S amplified to produce a copy ofthe sound in a loudspeaker. LOUDSPEAKER
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