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key word index

• A to D converter

• Amplitude modulation

• Analogue signal

• Attenuation

• Carrier wave

• Compact Disc

• Critical Angle

• D to A converter

• Demodulator

• Diffraction

• Digital signal

• Frequency modulation

• Input

• Interference

• Laser

• Loudspeaker

• Magnetic tape

• Multiplexing

• Noise

• Optical fibre

• Pulse Code Modulation

• Regenerator

• Total Internal Reflection

• Transmitter

• Vinyl Record

• Waves

Amplitude

The ‘height’ of a wave peak measured from its zero position.

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