Readings charted by an electroencephalograph confirmed that the electrical output of his brain had a different amplitude and voltage than other research subjects (Green, 2001).
Different sounds have been observed with different amplitudes and frequencies, implying different purposes.
Additionally, waves of different amplitudes will generate different pressure gradients, contributing to the non-linear effect.
(The response is itself a sinusoid, with the same frequency as the stimulus, but generally a different amplitude and phase.)
Compare the results and see if there are any obvious differences - e.g., different amplitudes, noise levels, frequencies, etc.
Moreover the apsidal line oscillates near the line of conjunction with different amplitude and a period of 2.5 to 3.0 centuries.
An antenna array is a group of radiators whose currents are of different amplitudes and phases.
This effect is attributed to the different vibrational amplitudes of isotopologues.
The station identification would be heard once or twice, possibly with different relative amplitudes, depending on the aircraft location.
However binaural beats can be heard when the tones have different amplitudes.