I'm having trouble understanding the concept of a Band-pass filter.
Not, that I have the following signal (in the frequency domain):
What I essentially need to do is remove the noise and only keep the highest frequency points (i.e. between 60-80 on the x axis) whilst removing the low frequencies. For this I need to use a band-pass filter, but, in order to implement such (coding project) should I:
1) use a low-pass filter AND 2) use a high-pass filter
If so, how would I therefore determine the cut off points to cut at in the signal?