Removing noise from impulse

Hi, I'm trying to perfom some analysis on a signal recorded from a load cell during an hammer strike. The strike is repeated with different materials hammer tips and at different velocities.

I would like to remove the noise, especially in the signals recorded for soft materials and small impact forces. I tried using an band pass filter (first figure) and a high pass filter (second figure) but both seem to amplify the noise in proximity of the peak.

I selected the frequences to cut looking at the FFT of the signal but changes if the thresholds don't make much difference

Are there any other ways of removing the noise from this kind of signal?

[Mathieu NOE]

hello

I don't see much noise on your pictures, but it would be nice to have some data if you can share them

what seems to me is that the sampling rate maybe a bit too low as we can see the signal having some straight portions in the "corners" (high curvature section)

now maybe another approach is to fit a model (gaussian pulse ?) to your data is you really need to smooth further.

[Star Strider]

If you are using the lowpass or bandpass functions, note that they design a FIR filter by default. If you want them to design a IIR filter, use the ImpulseResponse='iir' name-value pair. IIR filters usually produce better results, in my experience.

[Mathieu NOE]

data ??

[Riccardo]

Hi, unfortunately i'm not allowed to share the dataset. @Star Strider your advice was very helpful thanks

[Star Strider]

My pleasure!