I am testing the material properties of some very low stiffness materials.
I'm using a force probe connected to software, sensing at about a hundredth of a gram of force.
Now, what's interesting is when my sample rate is 1/sec I get a smooth line, as expected. If I increase the sample rate the line get a more jagged, increased frequency line - still as expected.
BUT the increased sample rate also increases the amplitude of the noise/signal and this I don't understand.
I hope I explained it well enough...
But basically why is it that increased sample rate is increasing the amplitude of the signal rather than just the frequency.