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AMPLITUDE
Amplitude means volume of an item, or how much in quantity. For
example, the amplitude of the number 3 is higher than the amplitude of
the number 2. The amplitude of a tall building is more than the
amplitude of a single story dwelling.
| Similarly, we can refer to the amplitude of a voltage, particularly
one used as a signal or even a wireless
frequency. A voltage of +5 volts is higher than a voltage of
+1 volts and therefore has a higher amplitude. However, for
voltage, we talk about amplitude being greater the further from 0
voltage. Such that a voltage of -5 volts has a higher amplitude
than -1 volts. |
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Amplitude can be used as a means for carrying audio information and
data information across a high frequency wireless carrier. We call
that amplitude modulation or simply
am. An audio frequency which is much lower
normally than the carrier frequency can modulate (add to) a high
frequency carrier to make its amplitude larger or smaller at the same
rate as the audio information we wish to transmit. Therefore even
though this information is now on a high frequency carrier for wireless
transmission, the audio information has been added to it - and can be
recovered by a receiver at a distance who wishes to listen to that audio
information.
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