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1 The amplitude of any wave is not affected by the medium of propagation. 2  Sound waves propagating in air have a lower amplitude than sound waves propagating under water.  Electromagnetic waves propagating in air have a higher amplitude than electromagnetic waves propagating under water.
Best Answer: Amplitude: measures how high and how low the waves travel compared to a straight line. Frequency: measures how many times per second the wave peaks. Four basic EEG brain waves: Delta waves, Theta waves, Alpha waves, and Beta waves constitute the standard lineup of EEG brainwave activity.requency: measures how many times per second the wave peaks. Four basic EEG brain waves: Delta waves, Theta waves, Alpha waves, and Beta waves constitute the standard lineup of EEG brainwave activity.